The chemical wear (corrosion-wear) of novel Cr based hard coated 316L austenitic stainless steels in aqueous saline solution

作者：Dearnley P A^*; Mallia B

来源：Wear, 2013, 306(1-2): 263-275.

DOI：10.1016/j.wear.2012.09.002

• Tribo-corrosion
• Surface engineering
• Corrosion-wear

Austenitic stainless steels are prone to galling and seizure in sliding contacts and display poor resistance to corrosion-wear. The purpose of this paper was to discover if the surface engineering of austenitic stainless steel via the application of Cr based hard coatings can alleviate this problem. Corrosion-wear tests using an aluminium oxide ball (pin) to slide against coated and uncoated AISI 3161 in 0.9% NaCl solution under a normal force similar to 1 N revealed degradation, under open circuit potential conditions, to be dominated by mechanically antagonized corrosion (Type I corrosion-wear) for all the test materials. A minor contribution to degradation was caused through superficial plastic deformation (micro-asperity shearing) of the contact surfaces took place but this was due to running-in and would have ceased after a short time once the asperities were flattened. It was accidentally discovered that pre-oxidation of the coated 316L steels, via vacuum heat treatment, resulted in an important and major improvement in corrosion-wear resistance.

• 出版日期2013-8-30