聚氯乙烯火灾烟气环境中无铅焊料腐蚀动力学预测模型  

Predictive model of corrosion kinetics for lead-free solder in polyvinyl chloride fire smoke environment

作　　者：李倩 林锦 赵梦珂 黎昌海[1] 陆守香[1] Qian LI;Jin LIN;Meng-ke ZHAO;Chang-hai LI;Shou-xiang LU(State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第7期2304-2312,共9页中国有色金属学报（英文版）

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

摘　　要：采用质量损失法研究聚氯乙烯火灾烟气环境中283.15~323.15 K温度范围内无铅Sn-3.0Ag焊料的腐蚀动力学、表面微观结构和腐蚀机理。结果表明,随着温度从283.15 K升高到323.15 K,Sn-3.0Ag焊料的质量损失从(22.09±2.01)g/m^(2)增加到(44.66±1.20)g/m^(2)。此外,腐蚀动力学符合阿伦尼乌斯定律。Sn-3.0Ag焊料表面腐蚀产物呈叠加生长趋势。在283.15 K,Sn-3.0Ag焊料的表面出现大量的腐蚀产物。Sn-3.0Ag无铅焊料的腐蚀过程为电化学腐蚀,阴极发生析氢和吸氧反应,阳极发生富锡相的溶解。腐蚀产物为Sn_(21)Cl_(16)(OH)_(14)O_(6)、SnO_(2)和SnO。The corrosion kinetics,surface microstructure,and corrosion mechanism of Sn−3.0Ag lead-free solder were investigated using mass-loss method in the temperature range from 283.15 to 323.15 K in polyvinyl chloride fire smoke environment.The results show that the Sn−3.0Ag solder exhibits an increase in mass-loss from(22.09±2.01)to(44.66±1.20)g/m^(2)as the temperature increases from 283.15 to 323.15 K.Moreover,the corrosion kinetics is in accordance with Arrhenius law.The surface corrosion products of Sn−3.0Ag solder show a superposition growth trend.At 283.15 K,the surface of Sn−3.0Ag solder shows significant corrosion products.The corrosion process of Sn−3.0Ag lead-free solder is an electrochemical corrosion.Hydrogen evolution and oxygen abstraction reactions occur in the cathode,and the dissolution of the Sn-rich phase occurs in the anode.The corrosion products are Sn_(21)Cl_(16)(OH)_(14)O_(6),SnO_(2),and SnO.

关 键 词：腐蚀 预测模型 Sn-3.0Ag焊料 火灾烟气 温度 

分 类 号：TG172[金属学及工艺—金属表面处理]