Effect of Micro-Area pH Value on Formation of Different Rust Phases of Weathering Steel in Initial Corrosion Period

被引：11

作者：

Chen Xiao-ping ^{[1
]}

Wang Xiang-dong ^{[1
]}

Liu Qing-you ^{[1
]}

Mi Feng-yi ^{[1
]}

Chen Ying ^{[1
]}

Li Yu-su ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China

来源：

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2010年 / 17卷 / 09期

关键词：

weathering steel; pH value; micro area; rust phase;

D O I：

10.1016/S1006-706X(10)60145-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The formation of protective rust layer of atmospheric corrosion resistance was discussed for weathering steel. The rust layers of experimental steels were made by using an accelerating industrial atmospheric corrosion test of dry-wet cyclic immersion. Furthermore XRD were used to measure and analyze the rust layers. The initial corrosion processes below thin water film were observed and the changes of micro-area pH value were measured. The results are as follows; The corrosion processes of P-RE weathering steel are obviously different from those of carbon steel. The surface of P-RE weathering steel rapidly forms alpha-FeOOH and the micro-area pH value is above 5. 4 during the initial corrosion period. While the component of the rust layer for the carbon steel is mainly Fe(3)O(4) and the microarea pH value is below 3. 8.

引用

页码：69 / +

页数：5