Surface Modification of 316L Stainless Steel with Acid Etching

The purpose of this study was to explore methods for improving bonding strength of polymer composite to metal surface by acid pretreatment. SEM, AFM and RA-IR were employed to evaluate the variation of the physical-chemical character of treated and untreated 316 L stainless steel. Meanwhile, the alterations of wettability of different pretreatment methods were discussed via contact angle measument. The result show that proper HCL etching pretreatment is proposed as a good method for improving the surface chemistry property of 316 L stainless steel and the bonding strength of ethylene vinyl alcohol copolymer to the metal surface.