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.
作者
李倩
林锦
赵梦珂
黎昌海
陆守香
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)
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)。
