无铅钎料的超电势问题研究

基金项目: 哈尔滨工业大学现代焊接生产技术国家重点试验室资助

A Study on Over-potential of Some Lead-free Solders

摘要: 通过对几种典型无铅钎料的电化学性能的研究,提出了无铅钎料研究开发及应用时应考虑因其超电势变化带来的影响问题。试验证明,含铋元素无铅钎料较传统的锡铅钎料超电势低,含铟无素无铅钎料则较锡铅钎料有较高的超电势,并证明这是由于合金中形成了InSn₄化合物的缘故,从而认为含铋无铅钎料应谨慎地使用于电器元件的焊接生产中,而含铟无铅钎料则较锡铅钎料具有更高的电化学安全性,在电器元件的焊接生产中具有良好的应用前景。
- 超电势 /
- 无铅钎料 /
- InSn₄
Abstract: Through the study of electrochemical performance of several lead-free solders, it is clear that the influence of over-potential variety on lead-free solders must be taken into consideration when developing and applying them. It has been found that lead-free solders with Bi have lower over-potentials, while lead-free solders with In which attributes to the formation of InSn₄ in alloys have higher over-potentials compared with conventional Tin-Lead solders. Therefore,lead-free solders with Bi must be considered carefully, while lead-free solders with In have higher electrochemical safety when they are applied in welding electrical apparatus. So lead-free solders with In may have good prospects for electronic devices.
- over-potential /
- lead-free solder /
- InSn₄