Corrosion behavior and life prediction of SAC305 solder joints in PVC fire smoke  

SAC305焊点在聚氯乙烯火灾烟气中的腐蚀行为及寿命预测

作　　者：Meng-ke ZHAO Jian-rui FENG Qian LI Shou-xiang LU Jin LIN 赵梦珂;冯舰锐;李倩;陆守香;林锦(中国科学技术大学火灾安全全国重点实验室,合肥230026)

机构地区：[1]State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第2期538-551,共14页中国有色金属学报(英文版)

基　　金：National Natural Science Foundation of China (No. 52206180);Fundamental Research Funds for the Central Universities,China (No. WK2320000050)。

摘　　要：The corrosion behavior and life of Sn−3.0Ag−0.5Cu solder joints were investigated through fire smoke exposure experiments within the temperature range of 45−80℃.The nonlinear Wiener process and Arrhenius equation were used to establish the probability distribution function and prediction model of the solder joint’s average life and individual remaining useful life.The results indicate that solder joint resistance shows a nonlinear growth trend with time increasing.After 24 h,the solder joint transforms from spherical to rose-like shapes.Higher temperatures accelerate solder joint failure,and the relationship between failure time and temperature conforms to the Arrhenius equation.The predicted life of the model is in good agreement with experimental results,demonstrating the effectiveness and accuracy of the model.开展烟雾暴露实验研究Sn-3.0Ag-0.5Cu焊点在45~80℃温度范围内的腐蚀行为和寿命。利用非线性Wiener过程和Arrhenius方程建立焊点平均寿命和个体剩余使用寿命的概率分布函数和预测模型。结果表明,随着时间的增加,焊点电阻呈非线性增长趋势。24小时后,焊点由球形转变为玫瑰形。温度越高,焊点失效越快,失效时间与温度的关系符合Arrhenius方程。模型预测寿命与实验结果吻合较好,验证了模型的有效性和准确性。

关 键 词：solder joints fire smoke corrosion behavior electrical performance degradation life prediction model 

分 类 号：TG42[金属学及工艺—焊接] TG172