Study on rust layers on steel in different marine corrosion zone |
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| Authors: | Li Yan-tao Hou Bao-rong |
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| Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao |
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| Abstract: | The Mossbauer spectra for corrosion products formed on A3 carbon steel and low alloy 16Mn steel exposed in the Chengdao sea area for 2 years by the electro-connected method were determined.
The phase composition and content of the rust layers on the two steels in four marine corrosion zones were analyzed and studied.
Although the phase composition of the two steels were different, their main phase was β-FeOOH. The different content of FeOOH
and Fe3O4 in the rust layers illustrated that FeOOH in the inner rust layer participated in the cathodic process as an oxidant accelerating
the corrosion rate of steel under wet/dry cycle condition. Moreover, for the alloy elements in 16Mn steel, the rust layers
with simple composition and fine and close texture formed a good barrier layer lowering the corrosion rate of low alloy steel.
Contribution No. 3318 from the Institute of Oceanology, Chinese Academy of Sciences.
Project 49476288 supported by NSFC. |
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| Keywords: | Mossbauer spectroscopy rust layer corrosion zone |
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