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 a Zn-30mass%Al thermal-sprayed coating using an accelerated atmospheric exposure test, and then the atmospheric corrosion properties were evaluated. X-ray diffraction results showed that the corrosion products formed on the coating owing to the accelerated atmospheric exposure test were the same as those formed in a typical atmospheric exposure test. The corrosion weight loss of the thermally sprayed coatings in the accelerated atmospheric exposure test was promoted by approximately 1.5 to 2.0 times compared to the atmospheric exposure test.