A Study of the Surface Durability of Waste-gated Turbocharger End Links

Authors: Saeed, A., Nazir, H. and Khan, Z.


Start date: 15 September 2016

Publisher: STLE

In performance; heavy duty diesel engine may come across environmental and operating conditions during which high salt and dust particles start to accumulate within the engine components. These deposits together with high temperatures often result in engine failures. The current research evaluates the surface modification and performance of waste-gate end-links of a diesel engine due to high salt and dust particles accumulation. Two types of waste-gate end-links (a) zinc coated steel and (b) stainless steel end-links were exposed to tests designed to deposit high salt and dust particles simultaneously on their surfaces. Results showed high salt and dust particle accumulation on the surfaces of zinc coated end-links, which as a consequence led to inadequate performance.

Heavy duty automotive diesel engine turbochargers are subject to harsh environmental and operating temperatures from ambient to 670°C. These harsh operating conditions lead to deterioration of interacting surfaces and critical components. The current study is looking into the durability issues of Zinc coated and Stainless Steel waste-gate end-links. Tests were conducted to simulate accelerated corrosion and dust particles test by using an environmental simulator.

Tests were performed for pre-determined duration of over 500 hours. Surface images were obtained to evaluate corrosion on the surfaces. Initiation and propagation of corrosion was recorded on both End-Links.

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