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| Corrosion Morphology Identification of Typical Materials in Xisha Marine Atmospheric Environment |
| Received:February 27, 2019 Revised:July 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.07.001 |
| KeyWord:Xisha marine atmosphere corrosion image processing percentage of corrosion area |
| Author | Institution |
| PENG Wen-shan |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| HOU Jian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| GUO Wei-min |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| DING Kang-kang |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| ZHANG Peng-hui |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| CHENG Wen-hua |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| SUN Ming-xian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
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| Abstract: |
| Objective To obtain the surface corrosion morphology parameters of typical materials in Xisha marine atmospheric environment, and analyze the corrosion regularities. Methods The corrosion morphology and corrosion law of 5052 aluminum al-loy, 304 stainless steel and EH36 low alloy steel in Xisha marine atmospheric environment were studied through outdoor exposure tests. The digital image processing method was used to analyze the corrosion characteristics of the sample surface. Results The atmospheric corrosion morphology of EH36 steel was mainly uniform corrosion and corrosion pits; while that of 5052 aluminum alloy and 304 stainless steel was mainly pitting corrosion. The corrosion rate of EH36 low alloy steel was significantly higher than that of 5052 aluminum alloy and 304 stainless steel. The change regularity of the percentage of corrosion area of these three typical materials was the same as the change regularity of the percentage of pits area. The change regularity of the percentage of corrosion area and the percentage of pits area of 5052 aluminum alloy and EH36 low alloy steel were consistent with the change of their cor-rosion rate; while the percentage of corrosion area and the percentage of pits area of 304 stainless steel were opposite to the change of its corrosion rate. For 5052 aluminum alloy and EH36 low alloy steel, the number of corrosion pits of the one-year period specimen was greater than that of the two-year period specimen. For 304 stainless steel, the number of corrosion pits of the one-year period specimen was not much different from that of the two-year period specimen. Conclusion The corrosion rate, cor-rosion area percentage, and percentage of pits area of these three typical materials in Xisha atmospheric environment are all signifi-cantly different. For the same material, the percentage of corrosion area, the percentage of pits area and the number of pits on the front side are quite different from those on the back side of the specimen. |
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