Title: Accelerated corrosion testing of vehicle exhausts

Authors: P.J. Shayler, N. Collings

Addresses: Department of Mechanical Engineering, University of Nottingham, UK. ' Department of Mechanical Engineering, University of Nottingham, UK

Abstract: Local rates of corrosive attack in an exhaust system cannot be predicted with certainty and field trials are inherently slow. Design assessment in the laboratory under controlled conditions and minimizing the real time required to produce a reference level of corrosion, is highly desirable. In this paper, the development of a 24-hour-day test facility is described. The facility has four engine/exhaust rigs with control and data acquisition by a single microcomputer. The exhausts are tested coupled to an engine to simulate service conditions, following a cycle of user-specified running conditions. A theoretical model has been developed to provide an insight to the way cycle specification and average corrosion rates are related. The model has been used to optimize cycle conditions, minimizing test duration.

Keywords: exhaust systems; corrosion testing; automatic data acquisition; automatic control; microcomputers; exhaust rigs; vehicle exhausts.

DOI: 10.1504/IJVD.1983.061298

International Journal of Vehicle Design, 1983 Vol.4 No.1, pp.53 - 60

Published online: 25 May 2014 *

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