Fluotitanate conversion fluid applied to surface of 6061 aluminum alloy and use method of fluotitanate conversion fluid

Abstract

The invention belongs to the technical field of metal material surface treatment technology, and particularly relates to a fluotitanate conversion fluid applied to the surface of a 6061 aluminum alloy and a use method of the fluotitanate conversion fluid. Each liter of the conversion fluid comprises raw material by weight as follows: 3 g of sodium fluoride, 4 g of ammonium fluorosilicate, 1.0 g of sodium hexametaphosphate, 1.5 g of titanium salt, 1.5 mg of hydrogen peroxide and the balance of water, wherein titanium salt is one of tetra-n-butyl titanate, titanium sulfate, titanyl sulfate and titanium chloride. Etched aluminum ions on the surface of the 6061 aluminum alloy participate in generation of a fluotitanate conversion coating at the normal temperature, so that particles on the coating are fine and compact, and the conversion coating is firmly combined with an aluminum alloy substrate and has characteristics of good corrosion resistance and high adhesive force when attached to an organic coating, and has the advantages of energy conservation, time saving, high production efficiency, low cost, simple process and stable performance.

Description

technical field

[0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to a fluorotitanate conversion solution applied to the surface of 6061 aluminum alloy and a use method. Background technique

[0002] In the manufacturing process of aluminum alloy, various alloying elements, such as Zn, Mg, Cu, Si, etc., are added due to the pursuit of high mechanical properties and comprehensive properties. The presence of these elements makes the internal chemical composition and structure of the aluminum alloy uneven, making the aluminum alloy material in the use environment (especially Cl - Under the conditions of existence), it is very easy to cause corrosion of the micro-battery and affect the service life of the material. Therefore, the protection of aluminum and its alloys has attracted more and more attention. Chromate passivation treatment has been widely used in the surface treatment of aluminum alloys. However, due...