Improving erosion corrosion resistance of medium carbon steel using electro less nickel plating

Abstract

This research devoted to studying improvement resistance for the mediumcarbon steel to erosion corrosion by coated with electro less nickel plating andused in this coated acid bath (Hydrogen number Ph = 4.5) at deferenttemperature (70,75,80,85,90°C) to obtained deferent deposition rate of coating.The experimental work test were done using special device which was designedand manufactured according to [ASTM (G73)] with certain modifications.Tests were made on corrosion (3.5wt ℅) sodium chloride Nacl solution as seawater purged with CO2 gas as the corrosive media and 1wt ℅ silica sand wasadded as slurry to that media.After traditional weight losses technique was achieved, it was found that corrosionrate decrease with increase value of hardness which increase at increasetemperature of coating solution. This indicate improvement corrosion resistance ofmetal. Heat treatment were done to coated specimens at deferent temperature(300,400,500,700,800°C). It was found that corrosion rate decrease at increase heat treatment temperature. This indicate improvement corrosion resistance but athigher ratio to that before made heat treatment. Smallest corrosion rate wasobtained at temperature 800C°.