Further Developments Towards a Standard Accelerated Corrosion Test for Automotive Materials 912277

To fill the gap between accelerated laboratory corrosion testing and real world corrosion behaviour Hoogovens developed its Cyclic Corrosion Test within a European framework. In 1989 Hoogovens presented during the SAE A.C.A.P. Corrosion Conference in Dearborn the results of its newly developed accelerated cyclic corrosion test dealing with the work carried out within the framework of an extensive test programme established by the Automotive Applications Committee of the American Iron and Steel Institute.
Objective of this AISI program is to develop a reliable laboratory accelerated test for cosmetic corrosion resistance in order to obtain a realistic ranking of automotive steel sheet products.
In 1990 a second test series was carried out with the Hoogovens Cyclic Test on the same type of test materials as was used in the first test series. These materials are various precoated and bare automotive sheet steels, pretreated and painted with a standard automotive coating system.
Objectives of this second program were to establish the reproducibility of the Hoogovens Cyclic Test and the effect of time, type of scribing, depth of scribe and type of assessment of paint delamination on the ranking of the various materials in terms of paint creep from the scribe.
Moreover, the influence of three different statistical techniques (Student's t with and without pooled variances and the ranksum test) on the discrimination of the various materials was established.
In this paper the results of the work are presented and discussed.


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