Method of preparing composite aluminum material
First Claim
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1. A method of preparing a composite aluminum material comprising the steps of:
- contacting an aluminum member at least partially with a treating solution containing 0.5-40 g/1 of potassium ions and 1-10 moles of fluorine ions per mole of potassium ions, said treating solution used to form a chemical conversion coating layer of potassium pentafluoroaluminate on a specified surface of said member; and
contacting said surface with a molten aluminum or aluminum alloy.
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Abstract
A method of preparing a composite aluminum material to be formed integrally by bonding aluminum or aluminum alloy to an aluminum or aluminum alloy member which is formed in advance in a specified shape by the method of internal chill, etc. The method comprises the steps of forming a chemical conversion coating of pentafluoroaluminate (K2 AlF5) by bringing a solution containing potassium ions and fluorine ions in contact with the surface of the aluminum member.
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Citations
8 Claims
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1. A method of preparing a composite aluminum material comprising the steps of:
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contacting an aluminum member at least partially with a treating solution containing 0.5-40 g/1 of potassium ions and 1-10 moles of fluorine ions per mole of potassium ions, said treating solution used to form a chemical conversion coating layer of potassium pentafluoroaluminate on a specified surface of said member; and contacting said surface with a molten aluminum or aluminum alloy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification