Zhang Peijun,Li Xinmei*,Yang Xianchen,et al.Corrosion behavior and life evaluation of galvanized coating in indoor simulated atmospheric environment[J].Plating & Finishing,2023,(2):94-100.[doi:10.3969/j.issn.1001-3849.2023.02.015]
镀锌层在室内模拟大气环境中腐蚀行为及寿命评估
- Title:
- Corrosion behavior and life evaluation of galvanized coating in indoor simulated atmospheric environment
- Keywords:
- galvanized layer ; marine atmospheric environment ; industrial atmospheric environment ; corrosion behavior ; life evaluation
- 分类号:
- TG172.3
- 文献标志码:
- A
- 摘要:
- 针对电力金具镀锌层在大气环境中腐蚀及寿命评估问题,通过 KY-YW40 室内腐蚀试验箱分别模拟工业、海洋腐蚀环境,采用 SEM 、 EDS 、 XRD 等测试技术表征其腐蚀特性,采用灰色关联方法计算青岛市和重庆市江津区两地室内外腐蚀行为的相关性。结果表明:在 0 ~ 96 h 阶段,工业大气环境中镀锌层的腐蚀深度和腐蚀速率的变化明显高于海洋大气环境。在 96 ~ 120 h 阶段,海洋大气环境的腐蚀速率接近工业大气环境,镀锌层在工业大气环境中锈层稀疏多孔,锈层主要成分为 Zn 4 SO 4 ( OH ) 6 ;而在海洋大气环境中,锈层由稀疏转变成致密, Cl - 易穿蚀锌层,造成铁基体腐蚀,锈层主要成分有 Zn 5 ( OH ) 8 Cl 2 H 2 O 和 Fe ( OH ) 2 。分别得到江津工业、青岛海洋大气环境室内外腐蚀时间相关模型: T 0 =23.55 T 和 T 0 =19.63 T ,室内腐蚀试验与室外暴露试验关联度大于 0.6 ,有良好相关性,可以有效评估工业、海洋大气环境下的腐蚀特性和寿命。
- Abstract:
- : In order to solve the problems of corrosion and life evaluation of galvanized coating of electric power fittings in atmospheric environment , KY-YW40 indoor corrosion test chamber was used to simulate industrial and marine corrosion environment respectively. The corrosion characteristics were characterized by SEM , EDS and XRD , and the grey correlation method was used to calculate the c orrelation between the indoor and outdoor corrosion behaviors in Qingdao and Jiangjin district of Chongqing. The results showed that the corrosion depth and corrosion rate of the galvanized coating in the industrial atmosphere were significantly different from that in the marine atmosphere during 0?96 h , but the corrosion rate of galvanized coating in the marine atmosphere during 96?120 h was close to that in the industrial atmosphere. In the industrial atmosphere , the rust layer was sparse and porous , and the main component of the rust layer was Zn 4 SO 4 ( OH ) 6 . In the marine atmosphere , the rust layer changed from sparse to dense , and Cl - easily penetrated the zinc layer , resulting in corrosion of the iron matrix , and the main components of the rust layer were Zn 5 ( OH ) 8 Cl 2 H 2 O and Fe ( OH ) 2 . The indoor and outdoor corrosion time correlation models of Jiangjin industrial and Qingdao marine atmospheric environment were obtained : T 0 = 23.55 T , T 0 =19.63 T . The correlation degree between indoor corrosion test and outdoor exposure test was greater than 0.6 , showing a good correlation , which can effectively evaluate the corrosion characteristics and life in industrial and marine atmosphere environment.
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备注/Memo
收稿日期: 2022-03-02 修回日期: 2022-04-26 作者简介: 张培军( 1995 —),男,硕士研究生, email : 1612211766@qq.com * 通信作者: 李新梅( 1971 —),女,博士,教授,博士生导师,主要从事材料表面改性方面的研究。 email : 35335499@qq.com 基金项目: 国家自然科学基金( 51865055 、 52161017 );新疆维吾尔自治区天山英才计划资助项目( 201720025 )