Zinc photo-corrosion in neutral solutions

被引：56

作者：

Kalinauskas, P ^{[1
]}

Valsiunas, I ^{[1
]}

Samuleviciene, M ^{[1
]}

Juzeliunas, E ^{[1
]}

机构：

[1] Inst Chem, Dept Corros, LT-2600 Vilnius, Lithuania

来源：

CORROSION SCIENCE | 2001年 / 43卷 / 11期

关键词：

photo-corrosion; photo-gravimetric effects; electrochemical quartz crystal nanogravimetry; corrosion photo-inhibition;

D O I：

10.1016/S0010-938X(01)00013-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photo-corrosion of zinc covered by an oxide layer in an oxygen atmosphere has been studied by polychromatic and laser illumination (lambda = 488 nm) in NaCl solution containing different amounts of dissolved oxygen. Corrosion acceleration by light occurs in the first stages of illumination. which was evident from both a positive photopotential shift as well as an increase in the cathodic limiting current. The acceleration effect disappeared in deoxygenated solution; therefore, it was ascribed to the photo-accelerated oxygen reduction. With illumination time the acceleration effect is replaced by photo-inhibition, which was evident from both impedance and mass-loss measurements. The inhibition effect was explained in terms of the light-assisted generation of a more protective layer on zinc. Photo-corrosion experiments by quartz crystal nanogravimetry did not supply evidence of photo-induced decomposition of the oxide layer during the initial corrosion stages. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2083 / 2092

页数：10

共 24 条

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