Experimental Study of Abrasive, Mechanical and Corrosion Effects in Ring-on-Ring Sliding Contact.

Jaroslaw Selech,Dawid Romek,Jakub Kowalczyk,Dariusz Ulbrich,Karol Nadolny,Konrad Wlodarczyk

doi:10.3390/ma13214950

Abstract

This article presents the application of the ring-on-ring test to investigate some of the important factors affecting the abrasive and corrosion wear of a face seal used in the sugar industry. The test involves the sliding contact between two steel rings working in different conditions such as mechanic, abrasive, corrosive extortions and its combination. Rings were made of the C45 steel and the surface layers were modified by heat and thermochemical treatment such as normalizing, flame hardening, nitriding and chrome diffusion. Maximum wear of the sample after tests under mechanic, abrasive and corrosion extortion were obtained. For C45 steel without surface modification the biggest wear was obtained for mechanical, abrasive and corrosive extortion and equals 0.0138 g. This value was three times bigger than the result for the mechanical extortion and ten times than for the corrosive conditions. For individual research options the percentage increase or decrease in wear resistance in relation to the normalized surface layer was determined. In the corrosive extortion the highest increase (90%) of wear resistance was recorded for the chrome layer relative to normalizing sample. The main conclusion of the paper is that the wear effect caused by all factors—mechanical, abrasive and corrosive—is not a straight sum of values of wear.

Highlights

Elements of machinery and equipment in the food industry, in many instances, work in technologically forced aggressive environments
Materials designed to work as operating elements of the machinery and equipment in that industry must be characterized by appropriate strength and resistance against abrasive wear and have specific characteristics of the surface layers, which are crucial in corrosion resistance [1]
The results indicate a great differentiation of resistance to this kind of corrosive extortion of the surface layers of samples in different options of surface treatment

Summary

Introduction

Elements of machinery and equipment in the food industry, in many instances, work in technologically forced aggressive environments. Materials designed to work as operating elements of the machinery and equipment in that industry must be characterized by appropriate strength and resistance against abrasive wear and have specific characteristics of the surface layers, which are crucial in corrosion resistance [1]. Many components made of different materials must be resistant to both abrasive and corrosive wear [2]. Corrosion processes, which occur together with natural tribological enforcements, in many cases, substantially change the mechanisms of tribological phenomena. It is reflected in reduction of durability of friction nodes and in particular, working elements exposed to aggressive substances. Wear of machine and equipment elements caused by two components at the same time: abrasive wear and corrosion, is not a sum of two values resulting from two separate processes but depends on a number of factors [3,4,5]

Methods

Results

Conclusion