آبكاري آلياژهاي آهن - نيكل - كروم با جريان ضربه يي

ELECTROPLATING OF Fe-Ni-Cr ALLOY WITH PULSE CURRENT

Fe-Ni-Cr alloy coatings have appropriate corrosion resistance and passivation ability. The coating morphology and composition effect these properties. The current density is one of the effective factors in morphology and composition of alloy coatings, changing current density will cause variety in composition and properties of coatings. In case of pulse current electroplating the variety increases. In this paper, the influences of current density and pulse parameters on composition of Fe-Ni-Cr alloy are studied. In the pulse current electroplating, the composition of alloy coatings is controlled by pulse parameters (Electronic Control). The corrosion resistance of alloy coatings (electroplating in direct and pulse procedures) is investigated and the results are compared . The pulse current causes decrease in the number of cracks of the coatings. Therefor these coatings have better corrosion resistance than direct current coatings in salt solutions.