| 摘要 |
PURPOSE:To obtain an easily handleable electrolytic soln. for electropolishing by which smooth polished surfaces having fine surface lsuter and free from pits are formed on Zr and Zr alloys, by adding sulfuric acid or sulfate to an electrolytic soln. contg. fluoride at a proper concn. CONSTITUTION:An electrolytic soln. for electropolishing Zr and Zr alloys is obtd. by adding 0.2-5mol/l fluoride and 0.01-3mol/l sulfuric acid and/or one or more kinds of sulfates. The electrolytic soln. is chemically stable and is not explosive. When Zr and Zr alloy are electropolished with the electrolytic soln., smooth polished surfaces having fine luster are formed without pitting. The smoothness of the polished surfaces can be further improved by adding 0.01-3mol/l one or more kinds of compds. selected among oxalic acid, citric acid, gluconic acid and salts of the acids to the electrolytic soln.
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