Effect Of Different Thickness Of Chrome Spray On The Exhaust Pipes

Cheah, Dow Sheng (2017) Effect Of Different Thickness Of Chrome Spray On The Exhaust Pipes. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Exhaust system in good working condition is vital for fuel mileage,the environment and the safety.The car's exhaust system carries away the gases created when the fuel and air are burned in the combustion chamber.These gases are harmful to humans and our environment.Frequent check of our exhaust system is a must to provide our safety and our family's safety.Make sure there are no holes in the exhaust system or in the passenger compartment where exhaust fumes could enter.The problem statement would be not only corrosion that deteriorates the lifespan of exhaust vehicles.Dirt,humidity,sand and foreign objects also can affect the condition of the exhaust pipes and its lifespan.The objectives of this study is to determine minimum layer of chrome coating needed to protect the exhaust pipes when it hits the bump or rocks on the road.The second objective is to investigate the effect of different sets of weights 1.25kg,1.5kg and 2.5kg dropped on the six different layers of chrome coating thickness.The different thickness will affect the corrosion rate on the exhaust pipes.The factors that might affect the speed of corrosion are first,the layer of coating,the chemical reaction happening at the bottom of the vehicle.The mechanical properties of the exhaust pipes were the main focus to study the corrosion of exhaust pipes.Kinetic study of corrosion rate of the exhaust pipes will be included in this project in order to know the durability of materials for the safety and also noise reduction for the drivers of cars.Then,the exhaust pipes underwent,drop test dent test and scratch test to investigate the changes of the properties and structure.The external factors for corrosion rate of new and old exhaust pipes include surrounding environment.From experiment,3 layers of coating are the best and minimum layer of coating for the exhaust pipes to withstand knocks from rocks and bumps on the road.The result for the old corroded exhaust pipe shows that the mechanical properties and its microstructure has been changed and altered.The coated chrome exhaust pipe by thick and good chrome material proved it lasts longer and more durable to dirt,water, gases and tar on the road. The exhaust pipe with thinner layer less lasting compared to thick and good material of chrome coating.

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