[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-657118-105":59,"doc-detail-657118-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","construction-of-a-pourbaix-diagram","Construction of a Pourbaix Diagram","","This document provides an analytical overview of the fundamental principles and methodology for constructing a Pourbaix diagram, which plots equilibrium potential against pH to determine the thermodynamic stability of chemical species. It explains the relationship between metal dissolution and half-cell reactions, noting the role of Nernst equations derived from thermodynamics. The guide outlines specific, step-by-step procedures for building these diagrams, using zinc as an illustrative case. It emphasizes that while the diagram accurately maps thermodynamically stable species at varying potential and pH levels, it does not provide insights into the kinetics of the corrosion process. Furthermore, the document explores water equilibrium reactions, identifying cathodic reactions—such as oxygen reduction and hydrogen evolution—that balance the anodic dissolution of metals in aqueous environments. By mapping the stable regions for oxygen, water, and hydrogen, it serves as an essential framework for understanding electrochemical stability and corrosion behavior in various solutions.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/construction-of-a-pourbaix-diagram/657118/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/construction-of-a-pourbaix-diagram/657118.png","ImageObject",300,407,{"name":92,"@type":93},"Guten Appetit_Joghurt","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-26",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does a Pourbaix diagram represent?","Question",{"text":112,"@type":113},"A Pourbaix diagram plots the equilibrium potential between a metal and its various oxidised species as a function of pH, identifying which species are thermodynamically stable at given conditions.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Does the Pourbaix diagram explain corrosion rates?",{"text":117,"@type":113},"No, the diagram is derived from thermodynamic principles and provides information on thermodynamic stability, but it offers no information regarding the kinetics or speed of a corrosion process.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the two common cathodic reactions in pure water?",{"text":121,"@type":113},"The two primary cathodic reactions are the reduction of dissolved oxygen (O2 + 4H+ + 4e- = 2H2O) and the hydrogen evolution reaction (2H+ + 2e- = H2).","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},657118,1792974448,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},1374408768420,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","# Construction of a Pourbaix Diagram\n\nA Pourbaix diagram plots the equilibrium potential (Ee : ) between a metal and its variousoxidised species as a function of pH.  \nThe extent of half-cell reactions that describe the dissolution of metal  \nM = Mz+ + ze -  \ndepend on various factors, including the potential, E, pH and the concentration of the oxidisedspecies, Mz+ . The Pourbaix diagram can be thought of as analogous to a phase diagram of analloy, which plots the lines of equilibrium between different phases as temperature andcomposition are varied.  \nTo plot a Pourbaix diagram the relevant Nernst equations are used. As the Nernst equation isderived entirely from thermodynamics, the Pourbaix diagram can be used to determine whichspecies is thermodynamically stable at a given E and pH. It gives no information aboutthe kinetics of the corrosion process.  \nConstructing a Pourbaix Diagram :  \nThe following steps illustrates how a Pourbaix diagram is constructed from first principles, usingthe example of Zinc.  \nStep 1 :  \nStep 2 :  \nStep 3 :  \nStep 4 :  \nStep 5:  \nStep 6:  \nStep 7 :  \nStep 8:  \nSource : http://www.doitpoms.ac.uk/tlplib/pourbaix/pourbaix_construction.php","cbCaipKx2JAFk7g7","https://ap.wps.com/l/cbCaipKx2JAFk7g7","pdf",694429,"English","# Introduction to Pourbaix Diagrams\n## Principles of Electrochemical Stability\n## Water Equilibria and Corrosion Reactions\n## Steps for Constructing a Diagram","[{\"question\":\"What does a Pourbaix diagram represent?\",\"answer\":\"A Pourbaix diagram plots the equilibrium potential between a metal and its various oxidised species as a function of pH, identifying which species are thermodynamically stable at given conditions.\"},{\"question\":\"Does the Pourbaix diagram explain corrosion rates?\",\"answer\":\"No, the diagram is derived from thermodynamic principles and provides information on thermodynamic stability, but it offers no information regarding the kinetics or speed of a corrosion process.\"},{\"question\":\"What are the two common cathodic reactions in pure water?\",\"answer\":\"The two primary cathodic reactions are the reduction of dissolved oxygen (O2 + 4H+ + 4e- = 2H2O) and the hydrogen evolution reaction (2H+ + 2e- = H2).\"}]","Construction of a Pourbaix Diagram | PDF",13]