CHEMICAL CONVERSION TREATMENT SOLUTION FOR MAGNESIUM ALLOY AND CHEMICAL CONVERSION TREATMENT METHOD USING SAME

摘要

A chemical conversion treatment solution for a magnesium alloy comprises: at least one hydroxide-based material selected from a group consisting of calcium hydroxide and sodium hydroxide; at least one phosphate selected from a group consisting of first sodium phosphate, first potassium phosphate, first ammonium phosphate, second sodium phosphate, second potassium phosphate, second ammonium phosphate, third sodium phosphate, third potassium phosphate, potassium polyphosphate, sodium polyphosphate, potassium pyrophosphate, acid sodium pyrophosphate, and sodium hexameta phosphate; at least one alkali metallic salt selected from a group consisting of sodium tartrate, potassium tartrate, sodium nitrate, and potassium nitrate; and at least one citric acid-based material selected from a group consisting of citric acid, sodium citrate, and potassium citrate. The chemical conversion treatment solution for a magnesium alloy has a pH level of 7.5-13.;COPYRIGHT KIPO 2016