An Investigation on Corrosion Resistance of Fasteners Treated with Dacromet Technique

Corrosion resistance of fasteners treated with dacromet technique has been investigated via wrenching tests‚ salt spray tests‚, immersion tests and SEM analysis‚, and the influence of fitting on corrosion resistance was covered.The results showed that the corrosion resistance of fasteners coated with dacromet coating is very well‚ fitting will damage dacromet coating on the fasteners‚, the damage of coating and decrease of corrosion resistance induced by the first fitting are little‚, but the corrosion resistance after secondary fitting will decrease obviously