Abstract
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 in accordance with 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.

Key words
railway, rail fastening, tension clamp, ZnAl coating, corrosion

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