THE SCANNING PHOTOELECTROCHEMICAL MICROSCOPY OF DIFFUSING HYDROGEN INTO METALS

被引：22

作者：

RAZZINI, G

MAFFI, S

MUSSATI, G

BICELLI, LP

机构：

[1] Dipartimento di Chimica Fisica Applicata del Politicnico, Centro di Studio sui Processi Elettrodici, CNR, 20131 Milano, Via Mancinelli

来源：

CORROSION SCIENCE | 1995年 / 37卷 / 07期

关键词：

D O I：

10.1016/0010-938X(95)00020-K

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new photoelectrochemical (PEC) technique is reported to image in real time the hydrogen diffusion into a metal in situ and continuously by means of a scanning laser spot. When a metal such as iron, stainless steel or nickel covered by a passive film is loaded with hydrogen and illuminated; the photoresponse of the passive film (the electrode is anodically polarized in an alkaline solution) is improved owing to the hydrogen photooxidation. This photoresponse is proportional to the hydrogen concentration in the metal. Scanning the metal surface by a laser spot in real time a well-detailed image is obtained of the diffusing hydrogen into the metal at a microscopic level. The present report describes the scanning photo-electrochemical microscopy (SPEM) of hydrogen diffution into an AISI 304 stainless steel foil.

引用

页码：1131 / 1141

页数：11

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