Effects of buffers on hydrogen evolution at iron electrodes

✍ Scribed by T. Hurlen; S. Gunvaldsen; F. Blaker

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 127 KB
• Volume: 29
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(84)87171-6

✦ Synopsis

In unbuffered aqueous solution, the hydrogen evolution at iron electrodes is usually first order in hydrogen-ion dependence at pH below about 7 and pH independent at higher pHC1-41. This indicates that hydrogen ions and water molecules are the main electroactive reactants for this reaction in acid and alkaline solution, respectively. In buffered solution, however, also the acid component of the buffer might be such a reactant. Information about this is often needed in corrosion research, but appears rather hidden in the literature. Some pertinent studies have therefore been made and are briefly described below.

Figures 14 show results of cathodic polarization measurements on high-purity iron electrodes in deoxygenated solutions of of various salt and buffer ElsceIV E (see) /V