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| Research the Performance Evolution of 7A04 and 2A97 in Typical Climatic Environment |
| Received:May 15, 2021 Revised:July 10, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.10.021 |
| KeyWord:typical climatic environment aluminum alloy appearance tensile strength elongation hardness |
| Author | Institution |
| YANG Yu-ping |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| LIU Jian |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| ZHAO Hong-kun |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| LIU Yan-fang |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| WANG Chong-wen |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| GE Fan |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| LUO Rui |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| XIAO Jian-jun |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
| YANG Pin-jie |
Yunnan North Photoelectric Instrument Co., Ltd, Kunming ,China |
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| Abstract: |
| This paper aims to study the effects of typical climate conditions such as hot and humid ocean, humid rain forest and warm wet acid rain on properties of 7A04 and 2A97.Through outdoor exposure test of 7A04 and 2A97 aluminum alloy sample was carried out. Appearance observation, mechanical property testing, chemical composition analysis were combined to study the performance evolution of 7A04 and 2A97 in typical climatic environment. After two years’ testing under hot and humid ocean, the surface of 7A04 appeared uniform corrosion, the tensile strength and elongation decreased, the hardness did not changed; After two years’ testing under hot and humid rain forest, the appearance, the tensile strength and the hardness did not changed, the elongation decreased; After two years’ testing under warm wet acid rain, the surface appeared pitting corrosion, the tensile strength and hardness did not changed,the elongation decreased. After two years’ testing under hot and humid ocean, the surface of 2A97 developed from pitting corrosion to local corrosion, the tensile strength and elongation decreased, the hardness did not changed; After two years’ testing under hot and humid rain forest, the appearance, the tensile strength, the elongation and hardness did not changed; After two years’ testing under warm wet acid rain, the appearance and hardness did not changed, the tensile strength and elongation decreased. 7A04 and 2A97 are easy to be corroded by hot and humid ocean and warm wet acid rain climate environment, while 7A04 and 2A97 are not easy to be corroded by hot and humid rain forest climate environment 2A97 has better corrosion resistance than 7A04. |
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