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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.

In the framework of an extensive test program established by the Automotive Applications Committee of the American Iron and Steel Institute, Hoogovens took part with its newly developed accelerated cyclic corrosion test. Objective of this 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. A number of standard treated steel sheet products were tested in the new cyclic test including cold-rolled steel, hot-dip galvanised steel and electroplated zinc and zinc-nickel. Also included was a second phosphate system for cold-rolled steel and hot-dip galvanised steel. Results of the test are given in terms of paint creep from the scribe and blistering along the scribe. It is concluded that the new test discriminates well between relatively “good” and “bad” materials. It appears that precoating is not always beneficial in lowering undercutting.