汪鹰
,
史苑芗
,
魏宝明
,
林昌健
腐蚀学报（英文）
采用扫描微参比电极技术(SRET)对钢筋在含氯离子的碱性体系中点蚀行为和缓蚀剂对钢筋再钝化性能的影响进行研究.结果表明,在实验条件下无论氯离子存在与否,微腐蚀点始终存在,且是不稳定的.氯离子只是形成宏观点蚀的必要条件.所用缓蚀剂中只有亚硝酸钠才能抑制已出现的宏观点蚀.
关键词:
扫描微参比电极(SRET)
,
pitting
,
micro pitting nucleus
,
inhibitors
,
repassivation
C. Liu and G.T. Burstein (Department of MateriaIs Science and Metallurgy
,
University of Cambridge
,
Pembroke Street
,
Cambridge CB2 3QZ
,
United Kingdom)
金属学报(英文版)
The passivity of guillotined aluminium electrode is enhanced in alkaline electrolytes by SiO32-. It is proposed that the formation of a complete aluminosilicate gel is responsible for this phenomenon. Dissolution of the metal proceeds via the existing film and the dissolution product reacts with SiO_3~2- ions to form the gel. Under galvanostatic polarisation, significant amount of the gel is formed when the applied anodic i > 10mA cm-2. This gel layer can then be transformed into barrier-type of oxide film, thus contributing to the initial stage of the high voltage anodisation.
关键词:
passivity
,
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,
null
,
null
,
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