基于镀锡银钎料钎焊304不锈钢接头的腐蚀行为
Corrosion behaviors of 304 stainless steel joints brazed with Sn-electroplated Ag brazing alloys
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摘要: 为揭示304不锈钢钎焊接头的腐蚀行为，以BAg50CuZn钎料为基材，采用电镀扩散工艺制备AgCuZnSn钎料，对304不锈钢进行感应钎焊，在60 ℃,3.5% NaCl溶液中评价不锈钢接头的局部腐蚀性，借助扫描电镜对其腐蚀形貌进行分析. 结果表明，经NaCl溶液腐蚀后，钎缝与不锈钢界面出现较长的腐蚀沟；304不锈钢表面腐蚀较严重，存在大范围坑洞、裂纹等缺欠，而钎缝区几乎无腐蚀缺欠，优先被腐蚀的是富铜相. 随着腐蚀时间延长，钎缝和304不锈钢的腐蚀速率均呈现先升高后降低的趋势，钎缝腐蚀速率略低于母材；腐蚀2.5 h后，钎缝区和304不锈钢的平均腐蚀速率分别为0.098和0.104 g/(m2·h).Abstract: To reveal the corrosion behavior of 304 stainless steel brazed joints in NaCl solution, the high Sn content of AgCuZnSn brazing alloys was prepared successfully by electroplating and thermal diffusion process. 304 stainless steels were induction brazed by using the prepared brazing alloys. 3.5% NaCl solution at the temperature of 60 ℃ was used to simulate seawater environment and determine the localized corrosion characteristic of 304 stainless steel brazed joints. The corrosion morphology was observed with scanning electron microscopy (SEM). The results showed that corrosion groove was found on the interface region between 304 stainless steel and brazing seam when the brazed joints were dipped in the solution of 3.5 % NaCl for 2.5 h. The serious corrosion phenomenon happened and a wide range of defects such as holes and cracks occurred on the surface of the 304 stainless steel, while almost no corrosion defects occurred in the brazing seam zone and Cu-rich phase was corroded preferably. The corrosion rate of brazing seam and base metal initially increased and then decreased with the increase of corrosion time. The corrosion rate of brazing seam was slightly lower than that of base metal. The average corrosion rates of brazing seam area and 304 stainless steel were 0.098 and 0.104 g/(m2·h) respectively.
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Keywords:
- 304 stainless steel /
- brazed joint /
- localized corrosion /
- Sn-plated Ag filler metals
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[1] 张青科， 裴夤崟， 龙伟民. 奥氏体不锈钢钎焊界面裂纹形成机制研究[J]. 金属学报， 2013， 49(10)： 1177-1184.Zhang Qingke， Pei Yinyin， Long Weimin. Investigation on formation mechanism of brazing cracks at the austenitic stainless steel/filler metal brazing joint interfaces[J]. Acta Metallurgica Sinica， 2013， 49(10)： 1177-1184.[2] Long W M， Zhang G X， Zhang Q K. In situ synthesis of high strength Ag brazing filler metals during induction brazing process[J]. Scripta Materialia， 2016， 110： 41-43.[3] 李明高. TiNi形状记忆合金与不锈钢的连接[D]. 长春： 吉林大学， 2006.[4] 杨 静， 李长香， 朱金霞， 等. Ag95CuNiLi钎料钎焊钛合金与不锈钢异种金属的性能分析Ⅰ. 钎料腐蚀性能[J]. 焊接学报， 2003， 24(6)： 60-62.Yang Jing， Li Changxiang， Zhu Jinxia， et al. Properties of Ag95CuNiLi fIler metal brazing titanium alloy and stainless steel I. Corrosion of filler metal[J]. Transactions of the China Welding Institution， 2003， 24(6)： 60-62.[5] 王星星， 杜全斌， 龙伟民， 等. 微米锡刷镀层对AgCuZnSn钎料性能的影响[J]. 焊接学报， 2015， 36(3)： 47-50.Wang Xingxing， Du Quanbin， Long Weimin， et al. Effect of micro tin brush-electroplated coating on properties of AgCuZnSn brazing filler metals[J]. Transactions of the China Welding Institution， 2015， 36(3)： 47-50.[6] 王星星， 李权才， 龙伟民， 等. 热扩散对镀锡银钎料界面组织及熔化特性的影响[J]. 焊接学报， 2016， 37(5)： 89-92.Wang Xingxing， Li Quancai， Long Weimin， et al. Effect of heat diffusion process on the interface microstructure and melting characteristic of brazing filler metals with tin coatings[J]. Transactions of the China Welding Institution， 2016， 37(5): 89-92.[7] 中国腐蚀与防护学会. 金属的局部腐蚀[M]. 北京： 化学工业出版社， 1995.[8] Li S X， Li L， Yu S R， et al. Investigation of intergranular corrosion of 316L stainless steel diffusion bonded joint by electrochemical potentiokinetic reactivation[J]. Corrosion Science， 2011， 53(1)： 99-104.[9] 沈长斌， 杨 野， 陈 影. AZ31镁合金搅拌摩擦焊焊缝电化学性能的分析[J]. 焊接学报， 2014， 35(9)： 101-104.Shen Changbin， Yang Ye， Chen Ying. Analysis of electrochemical property of AZ31 magnesium alloy friction stir weld[J]. Transactions of the China Welding Institution， 2014， 35(9)： 101-104. -
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