| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition of a PEO surface treatment solution for magnesium alloy products, which can form a firm, dense and uniform oxide film on the surface of a magnesium alloy product. SOLUTION: The composition of a PEO surface treatment solution for magnesium alloy products contains a sodium hydroxide (NaOH) solution as a basic solution. In the composition, 1-20 mass% of sodium fluoride (NaF); 1-15 mass% of trisodium phosphate (Na<SB>3</SB>PO<SB>4</SB>); 1-10 mass% of sodium pyrophosphate (Na<SB>4</SB>P<SB>2</SB>O<SB>7</SB>); 1-20 mass% of aluminum hydroxide (Al(OH)<SB>3</SB>); 1-20 mass% of sodium fluorosilicate (Na<SB>2</SB>SiF<SB>6</SB>); 1-10 mass% of potassium hydroxide (KOH); 1-15 mass% of potassium acetate (C<SB>2</SB>H<SB>3</SB>O<SB>2</SB>K); and 1-10 mass% of rare earth metal powder, each based on the mass of sodium hydroxide contained in the sodium hydroxide solution, are mixed in the sodium hydroxide solution. COPYRIGHT: (C)2011,JPO&INPIT
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