研究了耐候钢在青岛近海大气中曝晒3a的腐蚀行为， 观察测定了锈层与基体的界面形貌、相组成及锈层中合金元素的分布.结果表明，腐蚀3a的 耐候钢表面锈层有明显的分层现象；内锈层组织致密，主要有各向同性的α-FeOOH构成，在 偏光下检测消光；外锈层有γ—FeOOH和Fe2O3构成，在偏光下检测炫光；在内锈层中有 合金元素的富集.
Corrosion rate of carbon steel and the weathering st eel in the marine atmosphere by Qingdao for 3 years was compared,and the distrib ution of the alloy elements in the rust layer was determined. The result shows t hat the structure of corrosion rust of weathering steel exposed for 3 years cons isted of inner layer and outer layer obviously. The former was compacted and com posed of α-FeOOH mainly, and looked dark by the polarized light. However, the l atter is of γ-FeOOH and a little FeO, and appeared bright by the polarized ligh t.
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