Influence of The Material Surface to Give to Fretting Corrosion of Tin Plating

Abstract

The influence of material surface form on a fretting corrosion phenomenon of reflowed tin plating was investigated. This paper reports and discusses experimentally observed results on contact resistance behavior and wear behavior during fretting corrosion testing using samples with different surface roughness. The main results are summarized as follows. （a） The results of the fretting corrosion test showed the peak value of contact resistance decreased with the rough–surface samples. In addition, the amount of the deposited tin abrasion powder in the contact area was reduced in the rough–surface samples. （b） The rough–surface samples had both convex and concave areas. It is thought that the convex areas promote the discharge of tin abrasion powder to the outside of the contact area or to concave areas. （c） When the surface was flat, the deposited tin abrasion powder was found to be finely crushed. It is thought that oxidation of the abrasion powder was promoted by this condition of being finely crushed.