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High-luster magnesium alloy surface treatment method

A surface treatment and magnesium alloy technology, applied in the field of high gloss magnesium alloy surface treatment, can solve problems such as surface treatment technology, intergranular corrosion, difficult to produce smooth surface, etc.

Inactive Publication Date: 2007-11-14
何靖
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The third is that magnesium alloys are not corrosion-resistant, and are prone to intergranular corrosion in humid atmospheres, and it is difficult to produce a smooth surface.
[0003] After inquiry, in any information today, there is no related surface treatment technology for the smooth, glossy and mirror surface of magnesium alloys.

Method used

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Embodiment

[0028] As shown in Figure 1, the magnesium alloy workpiece surface treatment method of the present invention is to process the magnesium alloy workpiece to be processed one by one according to the following steps, including: firstly, the pretreatment step is carried out on the surface of the magnesium alloy workpiece, and then the high adhesion is performed on the magnesium alloy surface Electroless nickel plating step, followed by electroplating soft metal step on the electroless nickel plated surface, then polishing step on the soft metal surface, and then electroplating glossy hard metal step on the polished surface, etc. The magnesium alloy workpiece processed by the present invention adopts American standard AZ61A (the composition is shown in Table 3), and its material and mechanical property specifications conform to ASTM B 90M-85, so as to verify the benefits that the present invention can produce. In addition, the size of the magnesium alloy workpiece is 10cm long * Wi...

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Abstract

The invention correlates to an operation method of improving smooth glitter property after dealing with the surface of magnesium alloy. The method first does the preliminary treatment procedure to the surface of magnesium alloy workpiece, and then carries out chemical nickel plating procedure of high adhesiveness to the surface of magnesium alloy. After the procedure of electroplating soft metal to the surface of chemical nickel plating, the procedure is polishing in the surface of soft metal, and then the procedure is electroplating glitter hard metal in the surface of after polishing soft metal, so that it can reach the effect of high smooth glitter property to magnesium alloy workpiece.

Description

technical field [0001] The present invention relates to electrochemistry-related electroplating and electroless plating processes and physical grinding and polishing processes, in particular to a process method for improving the flat gloss properties of magnesium alloys after surface treatment, Background technique [0002] No matter how the blank of the magnesium alloy workpiece is made, its surface is rough and dull, the visible light reflectance rarely exceeds 30%, and the flatness RA value is at least less than 20μm. There are three main reasons: one is that the thermal expansion coefficient of the magnesium alloy is too large, generally exceeding 20 μm / m / ℃, and shrinkage streaks are inevitably produced during the thermoforming process. The second is that most magnesium alloys exist in the hexagonal closest-packed crystal form, and the sliding direction to be deformed in the solid state is very limited. During the cold forming process, slipbands and twin crystal structur...

Claims

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Application Information

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IPC IPC(8): C25D5/12C25D5/42C25D5/52
Inventor 何靖陈柏文
Owner 何靖
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