Aluminum alloy nickel-free environment-friendly hole sealing agent

Abstract

The invention relates to an aluminum alloy nickel-free environment-friendly hole sealing agent. The aluminum alloy nickel-free environment-friendly hole sealing agent is an aqueous solution, and the hole sealing agent further comprises 1-20 g / L of magnesium acetate, 0.01-1 g / L of heterocyclic compound, 5-30 g / L of a complexing agent and 0.01-10 g / L of a pH buffering agent, wherein the heterocyclic compound comprises one or more groups of sulfo groups, mercapto groups and amino groups. The hole sealing agent is simple in process, low in energy consumption, stable in hole sealing and processing effect and excellent in corrosion resistance, the environment protection requirements are met, and especially the excellent performances of hole sealing operation can be maintained after dyeing.

Description

technical field [0001] The invention relates to an aluminum alloy nickel-free environmental protection sealing agent, and also relates to an aluminum alloy product treated with the aluminum alloy nickel-free environmental protection sealing agent and a surface treatment method for the aluminum alloy product. Specifically, International Patent Classification number C22D23 / 00 is involved. Background technique [0002] The sealing of aluminum and its alloy anodized film is to block the nano-scale pores on the surface by physical or chemical methods, thereby reducing the porosity and adsorption performance of the anodized film, and improving the hardness and corrosion resistance of the anodized film. At present, the sealing methods of aluminum and its alloy anodized film mainly include boiling water or high temperature steam sealing technology, nickel salt or cobalt salt sealing technology and calcium magnesium salt sealing technology. [0003] The principle of boiling water or...

AI Technical Summary

Problems solved by technology

The disadvantages of these two sealing agents are that the fluoride ion used for sealing the pores consumes quickly and must be adjusted frequently, and because the application range of fluoride ions is narrow, it is difficult to adjust, resulting in good and bad sealing effects; sealing 20 Thick anodized film above micron is more difficult

[0006] In summary, the prior art does not provide a sealing treatment combination with simple process, low energy consumption, environmental protection requirements, stable sealing treatment effect, excellent corrosion resistance, especially after dyeing and sealing. substance or method

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