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Corrosion and Corrosive Wear of Steel for Automotive Exhaust Application

Crescent Institute of Science and Technology-Tiruvannamalai Rajendra Prasad Tamilarasan
SRM Institute of Science and Technology-Raj Rajendran
Published 2019-10-11 by SAE International in United States
In the current scenario, durable exhaust system design, development and manufacturing are mandatory for the vehicle to be competitive and challenging in the automotive market. Material selection for the exhaust system plays a major role due to the increased warranty requirements and regulatory compliances. The materials used in the automotive exhaust application are cast iron, stainless steel, mild steel. The materials of the exhaust systems should be heat resistant, wear and corrosion resistant. Stainless steel is the most commonly used material in the automotive exhaust system. Due to increasing cost of nickel and some other alloying elements, there is a need to replace the stainless steel with EN 8 steel. Recent trends are towards light weight concepts, cost reduction and better performance. In order to reduce the cost and to achieve better wear and corrosion resistance, the surface of the EN 8 steel is modified with coatings. This work focuses on the evaluation of corrosion and corrosive wear resistance of hard chrome plating (HCP), hot dip aluminized coatings (HDA), spray aluminized coatings (SA), electroless nickel…
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