Edge creep control ability of rust prevention paints and anticorrosive pigments for 55% Al-Zn-plated steel sheets

被引：0

作者：

Matsuda H. ^{[1
,3
]}

Ooshima T. ^{[2
,3
]}

Hayami Y. ^{[2
,3
]}

机构：

[1] RandD Division CM LABO, Kansai Paint Co.,Ltd

[2] Industrial Coating Division, Kansai Paint Co.,Ltd

[3] Hiratsuka, 254-8562, 4-17-1 4-17-1, Higashi-Yawata

来源：

Zairyo to Kankyo/ Corrosion Engineering | 2010年 / 59卷 / 09期

关键词：

55%a1-zn; Anticorrosive pigments; Chromá; Corrosion; Cyclic corrosion test; Edge creep; Impedance; Paints; Polarization curves; Pre-coated steel sheets; Te free;

D O I：

10.3323/jcorr.59.341

中图分类号：

学科分类号：

摘要：

To clarify mechanism of corrosion resistance in outdoor exposure tests for 55% Al-Zn-plated steel sheets, behavior in edge creep development was observed in various cyclic corrosion tests. One of cyclic corrosion tests with a relatively longer highly humid period showed similar corrosion behavior to that of an outdoor exposure test conducted in heavily corrosive area with salt damage. Then, electrochemical impedance of the test panels was measured after the cyclic corrosion tests to control the edge creep development The edge creep development was strongly depended on the following two factors. One is reaction between an anticorrosive pigment and the substrate where the plating has already dissolved away and the other is electrochemical barrier effect given by tightly adhered coating materials. A schematic diagram indicating the edge creep development was proposed and capability of the corrosion control by the used anticorrosive pigments was discussed with the diagram.

引用

页码：341 / 348

页数：7