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| Corrosion Behaviours of 30CrMnSiA High-strength Steel in Industrial and Marine Atmosphere Environments |
| Received:April 06, 2017 Revised:May 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.04.006 |
| KeyWord:30CrMnSiA high-strength steel atmospheric corrosion rust layer corrosion mass loss |
| Author | Institution |
| ZHANG Shi-yan |
Southwest Research Institute of Technology and Engineering, Chongqing , China |
| LUO Dan |
Southwest Research Institute of Technology and Engineering, Chongqing , China |
| YANG Ying |
Unit 95607 of the PLA, Chengdu , China |
| XU Ze-qi |
Southwest Research Institute of Technology and Engineering, Chongqing , China |
| WANG Ling |
Southwest Research Institute of Technology and Engineering, Chongqing , China |
| YANG Xiao-kui |
Southwest Research Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| Objective To provide useful references for the design of corrosion protection for 30CrMnSiA high-strength steel, the expansion of its applications and development of new types of high-strength steel. Methods Atmospheric corrosion behaviours of 30CrMnSiA high-strength steel exposed in industrial and marine atmosphere environments for 60 months were investigated in virtue of the corrosion mass loss, X-ray diffractmeter (XRD) and scanning electron microscope (SEM). Results The relationship between mass loss and exposure time obeyed well the following power function: lgΔw=2.245+0.387lg t and lgΔw =2.822+0.637lg t. Lepidocrocite and goethite were found as the major constituents of the rust layer formed in two types of atmosphere environments, and akaganeite was also detected in the marine atmosphere environment. The rust layer exhibited the tendency of flaking away from the substrate in marine atmosphere environment with the increase of exposing. Conclusion 30CrMnSiA high-strength steel exhibits high corrosion susceptibility and low corrosion susceptibility in marine atmosphere environment and industrial atmosphere environment, respectively. |
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