"Enhanced corrosion resistance of high-speed railway fastening systems: ZnAl coating on 38Si7 steel "

In this study, a ZnAl coating was applied to the SKL14 tension clamp, which is made of 38Si7 chemical composition, one of the HM-type rails fastening components, and its corrosion performance was evaluated.The corrosion test was conducted according to the EN ISO 9227 standard in a 5% NaCl environment for 720 hours.The test results were analyzed by ASTM D610-01.As a result, the non-coated sample completely rusted within 1 hour.The ZnAl coating successfully passed the corrosion test, showing only approximately 3 % rust.Weight losses for the non-coated samples, which completely rusted within the first hour, were found to be 0.02 g, whereas the ZnAl-coated samples exhibited a weight loss of 1.23 g after 720 hours of continuous exposure.The ZnAl coating improved the corrosion resistance of the tension clamp over 720 times and enhanced its mechanical properties. K e y w