Comparative Analysis of Coatings Applied for Anti-Corrosion Protection of Public Transport Vehicles' Structural Parts.

The conducted research focused on anti-corrosion systems applied for the protection of structural parts used in public transport vehicles. Detailed tests were carried out on samples taken from the brackets supporting the doors of a public transport bus. This work includes the results of the chemical analysis of the composition of snow-mud samples taken from the selected bus route and the results of laboratory tests performed on samples with various anti-corrosion coatings. Four types of samples made of S235JR steel with a zinc coating deposited by thermo-diffusion, electroplating, hot-dip zinc galvanization, and the cataphoresis method were tested. Both non-destructive tests-NDTs (the measurement of coating thickness and roughness, microscopic observations)-and destructive tests-DTs (scratch tests, salt chamber tests)-were performed. The conducted tests proved that the most effective method is the use of anti-corrosive hot-dip zinc coating.