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Abstract
Abstract Thin electroplated coatings of nickel, formed from a sulfamate bath, were shown to affect the corrosion of U-0.75 Ti in moist air at 105 C and in a dilute (50 ppm) NaCl solution at 25 C. Weight losses were observed for all samples in the salt solution, and the corrosion process followed the linear rate law. The corrosion rate of a sample with a coating thickness of 0.25 mil was actually greater than that of the bare alloy, but an increase in the coating thickness to 0.5 mil or greater caused a marked decrease in the corrosion rate. A porous, yellow corrosion product (hydrated uranium trioxide) existed on the bare alloy and on the 0.25 mil sample, the product being located at pores in the coating on the latter samples. The increased corrosion rate for the 0.25 mil sample was attributed to the fact that the uranium alloy is anodic to nickel, and the current density of the alloy at the bottom of the pores in the coating was much greater than that of the bare alloy. The markedly reduced corrosion rat...
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