Magnesium alloy pickling activator, pickling method and product

Abstract

The invention relates to a magnesium alloy pickling activator, a pickling method and a product. The pickling activator comprises the following components according to concentration: 5-20g / L 5-sulfosalicylic acid and 5-10g / L potassium fluoride. The pickling method comprises the steps of: (1) putting a magnesium alloy into a degreasing solution to undergo degreasing so as to remove surface greasy dirt; (2) washing the degreased magnesium alloy, and then placing it in the pickling activator to undergo a pickling activation treatment, with the pickling activator composed of the following components in terms of concentration: 5-20g / L 5-sulfosalicylic acid and 5-10g / L potassium fluoride; (3) washing the pickled magnesium alloy, then putting it into a?surface conditioning?agent to perform a surface conditioning treatment; and (4) washing the magnesium alloy subjected to surface conditioning, and then carrying out a formation treatment. The pickling activator adopts an inorganic acid, does not contain chromium compound, and has the advantage of mild reaction. The method abolishes the work of magnesium alloy surface grinding to save manpower and material resources.

Description

【Technical field】 [0001] The invention relates to a pickling activator and a pickling method, in particular to a magnesium alloy pickling activator, a pickling method and a product. 【Background technique】 [0002] Because magnesium alloy material is a light structural material, the quality is 2 / 3 of aluminum and 1 / 4 of steel. Compared with steel, aluminum, plastic and other engineering materials, magnesium alloy has good strength and rigidity, and good electromagnetic shielding performance , non-magnetic; good shock absorption; non-toxic, recyclable; excellent machining performance, high die-casting productivity, small size shrinkage, and has excellent low temperature performance and high thermal conductivity, so it is widely used. At present, it has become the main material in electronic products such as notebook computers, mobile phones, PDAs, etc., and the application range of magnesium alloys has rapidly expanded. [0003] However, before the magnesium alloy conversion ...

AI Technical Summary

Problems solved by technology

[0003] However, before the magnesium alloy conversion treatment, the magnesium alloy material must be pickled and activated to remove oxides, corrosion products and other pollutants on its surface and improve its surface quality. Many mature magnesium alloys have been pickled and cleaned before The process uses a solution of chromium-containing compounds. Since hexavalent chromium is discharged through wastewater, it will cause water and soil pollution, harm animals and plants, and does not meet the requirements of environmental protection. Therefore, countries around the world will gradually ban the use of chromium-containing compounds.

Before the chemical conversion treatment of magnesium alloy products, in order to remove the residual release agent in the die-casting section, the surface of the product needs to be polished, which consumes a lot of manpower and working hours

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