Evaluation of Corrosion Properties of Steel with Zn-30mass％ Al Thermal-Spray Coating Using Accelerated Atmospheric Exposure Test

Abstract

A four-year atmospheric exposure test was performed on steel with Zn-30mass％Al thermal-spray coating using the accelerated atmospheric exposure test, and atmospheric corrosion properties was evaluated. X-ray diffraction results showed that the corrosion products which formed on the coating film as a result of the accelerated atmospheric exposure test were the same as those which formed in a typical atmospheric exposure test. The amount of corrosion of the spray-coated film in the accelerated atmospheric exposure test was promoted by approximately 1.5 to 2.0 times compared to the atmospheric exposure test.