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| Corrosion Behavior of Low Alloy Steel P265GH in Simulated Atmospheric Environment with Pollutants |
| Received:June 12, 2015 Revised:August 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.04.013 |
| KeyWord:steel atmospheric corrosion synergic effect accelerated corrosion test |
| Author | Institution |
| LYU Wang-yan |
Electric Power Research Institute of Guangdong Power Grid Corporation， Guangzhou ， China |
| YU Quan-cheng |
Institute of Metal Research， Chinese Academy of Sciences， Shenyang ， China |
| WANG Zhen-yao |
Institute of Metal Research， Chinese Academy of Sciences， Shenyang ， China |
| SU Wei |
Electric Power Research Institute of Guangdong Power Grid Corporation， Guangzhou ， China |
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| Abstract: |
| Objective To investigate the corrosion behavior of low alloy steel P265GH in simulated atmospheric environment with pollutants, and discuss the influence of the synergic effect of NaHSO3 and NaCl on the atmospheric corrosion of P265GH. Methods SEM, XRD, FTIR and mass loss were used to analyze the corroded samples. Results In the environment with the presence of NaHSO3, α-FeOOH formed easily, while in the environment with the presence of NaCl,γ-Fe2O3 and Fe3O4 formed easily. The mass losses of P265GH steel in the presence of both NaHSO3 and NaCl were larger than those in the separate presence of NaHSO3 or NaCl. Conclusion There was synergic effect between NaHSO3 and NaCl in the atmospheric corrosion process of P265GH steel. The sequence of corrosive media affecting the corrosion process of P265GH steel was: NaHSO3 + NaCl > NaHSO3 > NaCl. |
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