Based on the actual corrosion behavior of electrical appliances and inadequacies of the conventional accelerated
corrosion tests, which are salt spray test (SST) and combined cyclic corrosion test (JASO M609-91), a new
accelerated corrosion test for electrical appliances, “ACTE (Accelerated Corrosion Test for Electrical Appliances)”
has been developed. A good correlation between ACTE and corrosion in actual environments was demonstrated.
ACTE consists of a salt deposition process and a cyclic wet/dry process. As distinctive features of ACTE, test
condition simulates actual environment (use of artificial seawater, constant absolute humidity), and it is possible to
estimate the corrosion life of materials in a wide range of use environment by obtaining dependency data on the
main corrosion factors (amount of deposited sea salt, etc.) by varying the test condition. ACTE makes it possible to
appropriately evaluate the corrosion resistance of zinc-coated steel sheets with chromate-free coating.
