Magnesium or magnesium alloy product and method for producing same
A manufacturing method, magnesium alloy technology, applied in the direction of anodic oxidation, etc., can solve the problems of complicated operation, increased manufacturing cost, and insufficient performance
Inactive Publication Date: 2006-11-29
冈山县地方政府 +2
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Problems solved by technology
However, it is necessary to form a plurality of resin layers after the anodizing treatment, which makes the operation complicated and increases the manufacturing cost.
Furthermore, the applicant (Tanaka Sangyo Co., Ltd.) of this JP-A No. 2001-152393 is the same as the applicant (Tanaka Sangyo Co., Ltd.) of the aforementioned JP-A No. 55-18540 published in the publication 20 years ago. A metal plating film that does not obtain sufficient performance by the method described in the above-mentioned JP-A-55-18540
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Embodiment 1
[0101] The ASTM No. AZ91D magnesium alloy composed of 90% by weight of magnesium, 9% by weight of aluminum, and 1% by weight of zinc was used as a raw material, and an alloy plate with a size of 170 mm×50 mm×2 mm manufactured by a thixomolding method was used as a test piece. The test piece was immersed in an acidic aqueous solution containing 2.2% by weight of phosphoric acid and a trace amount of surfactant, and then washed with ion-exchanged water. Next, after immersing in an alkaline aqueous solution containing 18% by weight of sodium hydroxide, it was washed with ion-exchanged water, and the surface of the test piece was pretreated.
[0102] An aqueous phosphoric acid solution and ammonia water are mixed to prepare an electrolyte containing phosphate radicals of 0.25 mol / L and a total amount of 1.5 mol / L of ammonia or ammonium ions, and the temperature is maintained at 20°C. The pH of this electrolyte is 11. The magnesium alloy test piece subjected to the above-mentioned pret...
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Abstract
A magnesium or a magnesium alloy product is disclosed which is produced by directly forming a metal plating film on a conductive anodic oxide coating which is formed on the surface of a magnesium or magnesium alloy. By immersing the magnesium or magnesium alloy in an electrolytic solution with a pH of 8-14 which contains 0.1-1 mol / L of a phosphoric acid radical, a conductive anodic oxide coating is formed on the surface of the magnesium or magnesium alloy through anodic oxidation, and consequently the surface can be subjected to electroplating. As a result, there is obtained a magnesium or a magnesium alloy product which is covered with a metal plating film having excellent corrosion resistance and adhesiveness.
Description
Technical field [0001] The present invention relates to a product made of magnesium or magnesium alloy formed with a metal plating film. More specifically, it relates to a product made of magnesium or magnesium alloy in which a metal plating film is directly formed on a conductive anodic oxide film formed on the surface of magnesium or magnesium alloy. In addition, it relates to the manufacturing method of such products. Background technique [0002] Magnesium and magnesium alloys are the lightest among practical metals, so they have high specific strength, good heat dissipation, and excellent recyclability compared to resins. Therefore, they have been widely used in electrical equipment and automotive parts in recent years. Among them, as small and light Quantified electrical equipment housings that require high performance, design, and recyclability are used appropriately. However, magnesium and magnesium alloys are prone to corrosion, so surface treatment or painting with corr...
Claims
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IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 日野实平松实酒井宏司奥田保广高见泽政男陈慧江
Owner 冈山县地方政府