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| Study on the Effect of Pitting Corrosion of Aluminum Alloy Hull on Tensile Properties Based on Quantitative Relationship |
| Received:April 23, 2021 Revised:May 21, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.12.010 |
| KeyWord:quantity relationship 5083 aluminum alloy pitting tensile property fitting regression analysis correlation analysis |
| Author | Institution |
| QI Yun-fei |
Central Iron & Steel Research Institute, Beijing , China |
| SUN Dan-dan |
Central Iron & Steel Research Institute, Beijing , China |
| DONG Cai-chang |
Central Iron & Steel Research Institute, Beijing , China |
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| Abstract: |
| The quantitative relationship between pitting corrosion and tensile properties can be used to provide data support for the proposal of the corresponding repair and replacement requirements for the 5083 aluminum alloy hull plates in different corrosion conditions. For a certain type of boat hull 5083 aluminum alloy plate that has been in service for ten years, the pitting corrosion characteristic parameter statistics and the tensile performance test are carried out, and the fitting regression analysis and correlation analysis of the four parameters of pitting corrosion and the loss of tensile strength are carried out to find the corresponding quantitative relationship.According to the fitting regression analysis, the maximum pitting depth is most correlated with the tensile property. In addition, the function relation between pitting parameters and tensile strength loss is obtained, and the corresponding indexes can be estimated. According to the correlation analysis, the correlation coefficient between the maximum pitting depth and tensile strength is greater than 0.9, which is a strong correlation. In the independent variables, there is a certain degree of redundancy in the two indicators of pitting depth.The study based on the pitting corrosion characteristics and the quantitative relationship of tensile properties can be used to predict the tensile properties of aluminum alloy hull plates and provide a basis for the replacement and repair of hull plates. |
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