{"id":1516,"date":"2026-07-13T11:59:06","date_gmt":"2026-07-13T09:59:06","guid":{"rendered":"https:\/\/procainsa.com\/que-es-la-proteccion-catodica-y-como-funciona\/"},"modified":"2026-07-13T16:47:50","modified_gmt":"2026-07-13T14:47:50","slug":"que-es-la-proteccion-catodica-y-como-funciona","status":"publish","type":"post","link":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/","title":{"rendered":"\u00bfQu\u00e9 es la protecci\u00f3n cat\u00f3dica y c\u00f3mo funciona?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Cathodic protection is an engineering technique that prevents the corrosion of metal structures by converting the metal to be protected into the cathode of an electrochemical cell. It is used in buried pipelines, tank farms, offshore infrastructure, and any metal installation in contact with an electrolyte \u2014soil, water, or seawater\u2014 where corrosion could compromise the safety or service life of the asset. <\/p>\n\n<p class=\"wp-block-paragraph\">At Procainsa, we have been designing and installing cathodic protection systems for the Oil &amp; Gas, petrochemical, and critical infrastructure sectors for over 35 years. In this article, we explain what it is, how it works at a technical level, and what types of systems exist. <\/p>\n\n<h2 class=\"wp-block-heading\">What is cathodic protection?<\/h2>\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/procainsa.com\/en\/cathodic-protection\/\" data-type=\"link\" data-id=\"https:\/\/procainsa.com\/proteccion-catodica\/\">Cathodic protection<\/a> is an electrochemical method of corrosion control. Its principle is simple: the corrosion of a metal is, in essence, an electrochemical reaction in which the metal loses electrons (oxidizes) when in contact with an electrolyte. If we manage to make that metal receive electrons from an external source instead of giving them up, the oxidation reaction slows down or stops completely.  <\/p>\n\n<p class=\"wp-block-paragraph\">That is exactly the objective of cathodic protection: to convert the metal structure we want to protect \u2014a pipeline, a tank, a pile\u2014 into the cathode of the system, so that another element oxidizes in its place.<\/p>\n\n<h2 class=\"wp-block-heading\">How does cathodic protection work?<\/h2>\n\n<p class=\"wp-block-paragraph\">For a metal structure to behave as a cathode, it needs to receive a continuous protective electric current. This current can come from two different sources, which give rise to the two main types of cathodic protection: <\/p>\n\n<ul class=\"wp-block-list\">\n<li>A more reactive metal that sacrifices itself in its place (sacrificial anodes), or<\/li>\n\n\n\n<li>A controlled external electric current source (impressed current cathodic protection).<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">In both cases, the circuit is completed through the electrolyte \u2014the soil, the water\u2014 and the result is the same: the protected structure stops losing electrons, and its corrosion is drastically reduced, in many cases to practically negligible levels throughout its design life.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-en-tierra-1024x683.webp\" alt=\"\" class=\"wp-image-1465\" srcset=\"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-en-tierra-1024x683.webp 1024w, https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-en-tierra-300x200.webp 300w, https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-en-tierra-768x512.webp 768w, https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-en-tierra.webp 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Types of cathodic protection<\/h2>\n\n<h3 class=\"wp-block-heading\">Sacrificial anode cathodic protection (galvanic protection)<\/h3>\n\n<p class=\"wp-block-paragraph\">Anodes of a more active metal (zinc, magnesium, or aluminum) are installed, electrically connected to the structure. The anode corrodes in a controlled manner and donates electrons to the protected structure. It does not require an external power source, making it common in medium-sized installations or where no electricity supply is available.  <\/p>\n\n<h3 class=\"wp-block-heading\">Impressed current cathodic protection<\/h3>\n\n<p class=\"wp-block-paragraph\">It uses an external power source (rectifier) that imposes a controlled direct current towards the structure through inert anodes (graphite, activated titanium, iron-silicon). This allows for the protection of large structures \u2014gas pipelines, oil pipelines, entire tank farms\u2014 with precise control over the applied protection level. <\/p>\n\n<p class=\"wp-block-paragraph\">The choice between one system or another depends on factors such as the extent of the installation, soil resistivity, availability of electrical supply, and the required design life.<\/p>\n\n<h2 class=\"wp-block-heading\">Where is cathodic protection applied?<\/h2>\n\n<p class=\"wp-block-paragraph\">Cathodic protection is essential for any critical metal installation in contact with soil or water:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Buried pipelines: gas pipelines, oil pipelines, gas and water distribution networks.<\/li>\n\n\n\n<li>Tank farms: storage tanks for fuels and chemical products.<\/li>\n\n\n\n<li>Offshore infrastructure: platforms, subsea pipelines, port structures.<\/li>\n\n\n\n<li>Gas stations and service stations: double-walled buried tanks and pipelines.<\/li>\n\n\n\n<li>Refineries and petrochemical plants: process networks and auxiliary infrastructure.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Without cathodic protection, these facilities would be exposed to a corrosion rate that would compromise their structural integrity long before the end of their design life, with the consequent risk of leaks, unplanned shutdowns, and repair costs far exceeding those of preventive protection.<\/p>\n\n<h2 class=\"wp-block-heading\">\u00bfPor qu\u00e9 es importante la protecci\u00f3n cat\u00f3dica en instalaciones industriales?<\/h2>\n\n<p class=\"wp-block-paragraph\">M\u00e1s all\u00e1 de alargar la vida \u00fatil del activo, la protecci\u00f3n cat\u00f3dica cumple un papel de seguridad operativa de primer orden en instalaciones donde una fuga \u2014de gas, de combustible, de producto qu\u00edmico\u2014 puede tener consecuencias graves. Por eso es un requisito habitual en normativa internacional (NACE SP0169, ISO 15589) y en los planes de gesti\u00f3n de la integridad de activos de cualquier operador industrial serio. <\/p>\n\n<p class=\"wp-block-paragraph\">A well-designed, correctly sized, and properly maintained cathodic protection system\u2014including periodic potential verification and anode replacement when appropriate\u2014can extend the lifespan of a metallic installation by several decades beyond what it would last without protection.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Do you need to design or audit a cathodic protection system?<\/strong><br\/>At Procainsa, we have been designing cathodic protection systems for critical industrial facilities for over 35 years, with NACE certified technicians.<\/p>\n\n<div style=\"height:47px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" style=\"background-color:#cd1818\"><strong>Learn about our cathodic protection service<\/strong><\/a><\/div>\n<\/div>\n\n<div style=\"height:47px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions about cathodic protection<\/h2>\n\n<h3 class=\"wp-block-heading\">What is cathodic protection?<\/h3>\n\n<p class=\"wp-block-paragraph\">It consists of converting the metallic structure to be protected into the cathode of an electrochemical cell, so that it receives electrons instead of giving them up. This is achieved either through sacrificial anodes (a more reactive metal that corrodes in its place) or through an impressed electric current from an external source. In both cases, the result is a drastic reduction in the corrosion of the protected structure.  <\/p>\n\n<h3 class=\"wp-block-heading\">What does &#8220;cathodic&#8221; mean in this context?<\/h3>\n\n<p class=\"wp-block-paragraph\">&#8220;Cathodic&#8221; refers to the cathode, the electrode in an electrochemical cell that receives electrons and where, therefore, no oxidation (corrosion) occurs. When we speak of &#8220;cathodic protection,&#8221; we refer to protecting a metallic structure by forcing it to behave as the system&#8217;s cathode. <\/p>\n\n<h3 class=\"wp-block-heading\">What are the types of cathodic protection?<\/h3>\n\n<p class=\"wp-block-paragraph\">There are two main types: sacrificial anode cathodic protection (also called galvanic protection), which uses a more reactive metal like zinc or magnesium to protect the structure without the need for external power; and impressed current cathodic protection, which uses an external power source and inert anodes to protect larger installations. <\/p>\n\n<h3 class=\"wp-block-heading\">Is cathodic protection the same as galvanic protection?<\/h3>\n\n<p class=\"wp-block-paragraph\">Galvanic protection is a specific type of cathodic protection: specifically, that which is based on sacrificial anodes. Every galvanic protection system is cathodic protection, but not all cathodic protection is galvanic (impressed current protection is not, as it is not based on a galvanic couple between metals but on an external power source). <\/p>\n\n<h3 class=\"wp-block-heading\">How is it verified that a cathodic protection system is working correctly?<\/h3>\n\n<p class=\"wp-block-paragraph\">Periodic measurements of the electrical potential of the structure relative to the ground are carried out, using reference electrodes. These measurements \u2014often using techniques such as CIPS (Close Interval Potential Survey)\u2014 allow verifying that the level of protection is maintained within the criteria established by the applicable regulations throughout the entire layout of the installation. <\/p>\n\n<script type=\"application\/ld+json\">{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u00bfEn qu\u00e9 consiste la protecci\u00f3n cat\u00f3dica?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Consiste en convertir la estructura met\u00e1lica que se quiere proteger en el c\u00e1todo de una celda electroqu\u00edmica, de forma que reciba electrones en lugar de cederlos. Esto se logra mediante \u00e1nodos de sacrificio (un metal m\u00e1s reactivo que se corroe en su lugar) o mediante una corriente el\u00e9ctrica impresa por una fuente externa. En ambos casos, el resultado es que la corrosi\u00f3n de la estructura protegida se reduce dr\u00e1sticamente.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u00bfQu\u00e9 significa \\\"cat\u00f3dico\\\" en este contexto?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\\\"Cat\u00f3dico\\\" hace referencia al c\u00e1todo, el electrodo de una celda electroqu\u00edmica que recibe electrones y donde, por tanto, no se produce oxidaci\u00f3n (corrosi\u00f3n). Cuando hablamos de \\\"protecci\u00f3n cat\u00f3dica\\\", nos referimos a proteger una estructura met\u00e1lica forzando su comportamiento como c\u00e1todo del sistema.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u00bfCu\u00e1les son los tipos de protecci\u00f3n cat\u00f3dica que existen?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Existen dos tipos principales: protecci\u00f3n cat\u00f3dica por \u00e1nodos de sacrificio (tambi\u00e9n llamada protecci\u00f3n galv\u00e1nica), que usa un metal m\u00e1s reactivo como el zinc o el magnesio para proteger la estructura sin necesidad de alimentaci\u00f3n externa; y protecci\u00f3n cat\u00f3dica por corriente impresa, que usa una fuente de alimentaci\u00f3n externa y \u00e1nodos inertes para proteger instalaciones de mayor extensi\u00f3n.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u00bfLa protecci\u00f3n cat\u00f3dica es lo mismo que la protecci\u00f3n galv\u00e1nica?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"La protecci\u00f3n galv\u00e1nica es un tipo espec\u00edfico de protecci\u00f3n cat\u00f3dica: concretamente, la que se basa en \u00e1nodos de sacrificio. Todo sistema de protecci\u00f3n galv\u00e1nica es protecci\u00f3n cat\u00f3dica, pero no toda protecci\u00f3n cat\u00f3dica es galv\u00e1nica (la protecci\u00f3n por corriente impresa no lo es, ya que no se basa en un par galv\u00e1nico entre metales sino en una fuente de alimentaci\u00f3n externa).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u00bfC\u00f3mo se verifica que un sistema de protecci\u00f3n cat\u00f3dica est\u00e1 funcionando correctamente?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Se realizan mediciones peri\u00f3dicas de potencial el\u00e9ctrico de la estructura respecto al terreno, utilizando electrodos de referencia. Estas mediciones \u2014a menudo mediante t\u00e9cnicas como el CIPS (Close Interval Potential Survey)\u2014 permiten comprobar que el nivel de protecci\u00f3n se mantiene dentro de los criterios establecidos por la normativa aplicable a lo largo de todo el trazado de la instalaci\u00f3n.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n<div style=\"height:69px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Do you have a cathodic protection project?<\/h2>\n\n<p class=\"wp-block-paragraph\">Our technical team analyzes your installation and proposes the most suitable cathodic protection system, with over 35 years of experience in the Oil &amp; Gas and petrochemical sector.<\/p>\n\n<div style=\"height:47px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" style=\"background-color:#cd1818\"><strong>Request information<\/strong><\/a><\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discover what cathodic protection is, how it works at an electrochemical level, and what types exist: sacrificial anodes and impressed current.<\/p>\n","protected":false},"author":7,"featured_media":1508,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-1516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cathodic-protection"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Cathodic Protection and How Does It Work? | Procainsa<\/title>\n<meta name=\"description\" content=\"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Cathodic Protection and How Does It Work? | Procainsa\" \/>\n<meta property=\"og:description\" content=\"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/\" \/>\n<meta property=\"og:site_name\" content=\"Protecci\u00f3n cat\u00f3dica y Gesti\u00f3n de la integridad | Procainsa\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-13T09:59:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-13T14:47:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Cristian\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Cristian\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/\"},\"author\":{\"name\":\"Cristian\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#\\\/schema\\\/person\\\/d18b0d6e235753c50a64a71aed1a985f\"},\"headline\":\"\u00bfQu\u00e9 es la protecci\u00f3n cat\u00f3dica y c\u00f3mo funciona?\",\"datePublished\":\"2026-07-13T09:59:06+00:00\",\"dateModified\":\"2026-07-13T14:47:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/\"},\"wordCount\":1087,\"publisher\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/proteccion-catodica-que-es.webp\",\"articleSection\":[\"Cathodic Protection\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/\",\"url\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/\",\"name\":\"What is Cathodic Protection and How Does It Work? | Procainsa\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/proteccion-catodica-que-es.webp\",\"datePublished\":\"2026-07-13T09:59:06+00:00\",\"dateModified\":\"2026-07-13T14:47:50+00:00\",\"description\":\"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#primaryimage\",\"url\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/proteccion-catodica-que-es.webp\",\"contentUrl\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/proteccion-catodica-que-es.webp\",\"width\":1536,\"height\":1024,\"caption\":\"Detailed illustration of how cathodic protection stops corrosion in metal structures submerged in an electrolyte, showing the flow of electrons to prevent oxidation.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/que-es-la-proteccion-catodica-y-como-funciona\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\\\/\\\/procainsa.com\\\/en\\\/procainsa\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u00bfQu\u00e9 es la protecci\u00f3n cat\u00f3dica y c\u00f3mo funciona?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/procainsa.com\\\/en\\\/\",\"name\":\"Procainsa\",\"description\":\"Soluciones de Ingenier\u00eda avanzada\",\"publisher\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#organization\"},\"alternateName\":\"Procainsa | Protecci\u00f3n Cat\u00f3dica\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/procainsa.com\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#organization\",\"name\":\"Procainsa S.A\",\"url\":\"https:\\\/\\\/procainsa.com\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/LOGO.webp\",\"contentUrl\":\"https:\\\/\\\/procainsa.com\\\/wp-content\\\/uploads\\\/LOGO.webp\",\"width\":350,\"height\":76,\"caption\":\"Procainsa S.A\"},\"image\":{\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/procainsa-ingenieria\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/procainsa.com\\\/en\\\/#\\\/schema\\\/person\\\/d18b0d6e235753c50a64a71aed1a985f\",\"name\":\"Cristian\",\"url\":\"https:\\\/\\\/procainsa.com\\\/en\\\/author\\\/cristian\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is Cathodic Protection and How Does It Work? | Procainsa","description":"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/","og_locale":"en_US","og_type":"article","og_title":"What is Cathodic Protection and How Does It Work? | Procainsa","og_description":"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.","og_url":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/","og_site_name":"Protecci\u00f3n cat\u00f3dica y Gesti\u00f3n de la integridad | Procainsa","article_published_time":"2026-07-13T09:59:06+00:00","article_modified_time":"2026-07-13T14:47:50+00:00","og_image":[{"width":1536,"height":1024,"url":"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp","type":"image\/webp"}],"author":"Cristian","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Cristian","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#article","isPartOf":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/"},"author":{"name":"Cristian","@id":"https:\/\/procainsa.com\/en\/#\/schema\/person\/d18b0d6e235753c50a64a71aed1a985f"},"headline":"\u00bfQu\u00e9 es la protecci\u00f3n cat\u00f3dica y c\u00f3mo funciona?","datePublished":"2026-07-13T09:59:06+00:00","dateModified":"2026-07-13T14:47:50+00:00","mainEntityOfPage":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/"},"wordCount":1087,"publisher":{"@id":"https:\/\/procainsa.com\/en\/#organization"},"image":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#primaryimage"},"thumbnailUrl":"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp","articleSection":["Cathodic Protection"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/","url":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/","name":"What is Cathodic Protection and How Does It Work? | Procainsa","isPartOf":{"@id":"https:\/\/procainsa.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#primaryimage"},"image":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#primaryimage"},"thumbnailUrl":"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp","datePublished":"2026-07-13T09:59:06+00:00","dateModified":"2026-07-13T14:47:50+00:00","description":"What cathodic protection is, how it works, and what types exist: sacrificial anodes and impressed current. Complete technical guide from Procainsa.","breadcrumb":{"@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#primaryimage","url":"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp","contentUrl":"https:\/\/procainsa.com\/wp-content\/uploads\/proteccion-catodica-que-es.webp","width":1536,"height":1024,"caption":"Detailed illustration of how cathodic protection stops corrosion in metal structures submerged in an electrolyte, showing the flow of electrons to prevent oxidation."},{"@type":"BreadcrumbList","@id":"https:\/\/procainsa.com\/en\/que-es-la-proteccion-catodica-y-como-funciona\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Portada","item":"https:\/\/procainsa.com\/en\/procainsa\/"},{"@type":"ListItem","position":2,"name":"\u00bfQu\u00e9 es la protecci\u00f3n cat\u00f3dica y c\u00f3mo funciona?"}]},{"@type":"WebSite","@id":"https:\/\/procainsa.com\/en\/#website","url":"https:\/\/procainsa.com\/en\/","name":"Procainsa","description":"Soluciones de Ingenier\u00eda avanzada","publisher":{"@id":"https:\/\/procainsa.com\/en\/#organization"},"alternateName":"Procainsa | Protecci\u00f3n Cat\u00f3dica","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/procainsa.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/procainsa.com\/en\/#organization","name":"Procainsa S.A","url":"https:\/\/procainsa.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/procainsa.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/procainsa.com\/wp-content\/uploads\/LOGO.webp","contentUrl":"https:\/\/procainsa.com\/wp-content\/uploads\/LOGO.webp","width":350,"height":76,"caption":"Procainsa S.A"},"image":{"@id":"https:\/\/procainsa.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/procainsa-ingenieria\/"]},{"@type":"Person","@id":"https:\/\/procainsa.com\/en\/#\/schema\/person\/d18b0d6e235753c50a64a71aed1a985f","name":"Cristian","url":"https:\/\/procainsa.com\/en\/author\/cristian\/"}]}},"_links":{"self":[{"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/posts\/1516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/comments?post=1516"}],"version-history":[{"count":9,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":1547,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/posts\/1516\/revisions\/1547"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/media\/1508"}],"wp:attachment":[{"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/media?parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/categories?post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/procainsa.com\/en\/wp-json\/wp\/v2\/tags?post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}