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Evaluation of materials used for coatings of electrical connectors used in the electrical harness of passengers cars
1
Faculty of Mechanical Engineering, Division of Automotive Enigneering, Wroclaw University of Science and Technology, Poland
2
Faculty of Mechanical Engineering, Department of Mechanics, Materials and Biomedical Engineering, Wroclaw University of Science and Technology, Poland
Submission date: 2022-01-03
Final revision date: 2022-05-25
Acceptance date: 2022-05-29
Online publication date: 2022-07-07
Publication date: 2023-01-02
Corresponding author
Paulina Adamczyk
Faculty of Mechanical Engineering, Division of Automotive Enigneering, Wroclaw University of Science and Technology, Wrocław, Poland
Faculty of Mechanical Engineering, Division of Automotive Enigneering, Wroclaw University of Science and Technology, Wrocław, Poland
Combustion Engines 2023,192(1), 43-49
KEYWORDS
TOPICS
ABSTRACT
Automotive electrical connectors are the essential components of a wiring harness. They are typically made of copper, which has excellent electrical conductivity. Due to the limited corrosion resistance of pure copper, connectors are often coated with other metals. In this paper, the qualities of coatings made of gold and tin are investigated and compared. The samples were examined by a metallographic microscope and scanning electron microscope (SEM). The examination revealed uneven thickness, delamination of the coatings, and issues with the preparation of the core material for coating. Numerous burrs and irregularities were observed. Selected samples were examined in salt solution to test their corrosion resistance. Even though gold is a noble metal and its electrochemical potential is higher, the tin coating was more resistant to corrosion.
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