Application Note CORR4 UniFI（应用注释CORR4UniFI）.pdfVIP

Application Note CORR-4 Subject: Electrochemistry and Corrosion: Overview and Techniques INTRODUCTION Before going on to specific corrosion techniques, let’s begin with an overview of electrochemistry and its During the late 70’s and early 80’s, corrosion specialists associated instrumentation as it pertains to corrosion began to discover that electrochemical (ECHEM) measurements. instruments could be valuable problem solving tools. When manufacturers began to produce more compact and easy to use instruments, they became even more popular. ELECTROCHEMISTRY – WHY AND The proliferation of books, papers and articles on the HOW advantages of ECHEM corrosion measurement makes it clear that ECHEM instrumentation is becoming a Since corrosion is actually a process involving significant part of the corrosion specialist’s repertoire. electrochemical oxidation and reduction reactions, it makes sense that electrochemical methods can be used to Because of the rapid expansion in the literature, study and measure corroding systems. newcomers are learning that ECHEM instruments can help solve many of their most tedious and persistent More specifically, when a metal is immersed in a given corrosion problems. Techniques for applications such as solution, electrochemical reactions characteristic