Study On Effect of Fe Density on Electrolyte Exfoliation of Chromium Plating Layer

Title & Authors
Study On Effect of Fe Density on Electrolyte Exfoliation of Chromium Plating Layer
Park, Jin-Saeng;

Abstract
The internal chromium plating of a long-axis tube is widely used in military and industrial application, with the thick hard plating formed using a mixed solution of Chromium acid and catalytic $\small{H_2SO_4}$. A large-caliber gun can endure a high explosive force as a result of the increased stiffness and wear resistance provided by this internal hard chromium surface. The internal chromium layer of a tube is prone to exfoliation caused by the high kinetic energy of the projectile and high pressure of the explosion. Therefore, we reviewed the plating process. Chromium plating comprises many steps, including the removal of Grease, water cleaning, electrolytic abrasion, etching, plating, water cleaning, and hydrogen brittleness removal. The exfoliated chromium plating layer is affected by the adhesion property of the plating. In particular, the Fe concentration of the electrolyte affects the adhesion property. The optimum Fe concentration for effectively suppressing the exfoliation of the plating layer was established by using a scanning electron microscope to determine the surface roughness, and the effectiveness was proved in an adhesion test, etc.
Keywords
Electrolytic Abrasion;Chromium Plating of A Long-Axis Tube;Adhesion Test;SEM;
Language
Korean
Cited by
References
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Park, J. K., 2014, "Corrosion Protection and Surface Treatment," Sejin Publisher(Seoul, Korea), pp. 69-74.

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Lee, H. Y., 2013, "The Engineering of Metal Corrosion," Yeon Keung Culture Pulblisher(Seoul, Korea), pp. 38-57.