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Blackening liquid for chromium-free titanium-zinc panel surface and using method of blackening liquid

A technology of blackening treatment and titanium-zinc plate, which is applied in the coating process of metal materials, etc., to achieve the effects of strong corrosion resistance, simple raw material composition, strong application prospects and market competitiveness

Inactive Publication Date: 2014-06-11
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that there are few research reports on the process of applying a chromium-free blackening protective layer on the surface of titanium-zinc plate, a new type of material, in the prior art, and to provide a chromium-free blackening of the surface of titanium-zinc plate Treatment liquid and method of use

Method used

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  • Blackening liquid for chromium-free titanium-zinc panel surface and using method of blackening liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) The formula of blackening treatment solution is (taking 1L as an example): 25g ammonium molybdate; 0.6g copper sulfate; 2.5g nickel sulfate; 2g sodium sulfite; 2.5g sodium thiosulfate; 4g aluminum chloride; 3.5g zinc chloride ; Citric acid 0.1g; Thiourea 0.1g; Add acetic acid with a concentration of 20g / L to adjust the pH to 1-1.5; the balance is water.

[0028] 2) According to the formula of the blackening treatment solution described in step 1), after weighing the reagent, put it into a beaker, stir and dissolve it completely, and obtain the blackening treatment solution of Example 1.

[0029] 3) Degrease the titanium-zinc plate workpiece and clean it with water; among them, the degreasing treatment is: mix 20g / L sodium carbonate, 25g / L sodium phosphate, and 4g / L OP-10 emulsifier at 65°C Next, process for 1min;

[0030] 4) Pickle the titanium-zinc plate treated in step 3) with a mixture of 1% hydrofluoric acid and 2% sulfuric acid for 1 second, and then wash it wi...

Embodiment 2

[0035] 1) The formula of blackening treatment liquid is (taking 1L as an example): 2g sodium tungstate; 10g copper sulfate; 2.0g nickel sulfate; 1g sodium sulfite; 3g sodium thiosulfate; 3g aluminum chloride; 5g zinc chloride; fluoroboric acid Sodium 10g; hydroquinone 0.1g; sodium tartrate 0.1g; add phosphoric acid with a concentration of 10g / L to adjust the pH to 1-1.5; the balance is water.

[0036] 2) According to the formula of the blackening treatment solution described in step 1), after weighing the reagent, put it into a beaker, stir and dissolve it completely, and obtain the blackening treatment solution of Example 2.

[0037] 3) Degrease the titanium-zinc plate workpiece and clean it with water; among them, the degreasing treatment is: mix 20g / L sodium carbonate, 25g / L sodium phosphate, and 4g / L OP-10 emulsifier at 65°C Next, process for 1min;

[0038] 4) Pickle the titanium-zinc plate treated in step 3) with a mixture of 1% hydrofluoric acid and 2% sulfuric acid for...

Embodiment 3

[0043] 1) The formula of blackening treatment solution is (taking 1L as an example): 20g sodium molybdate; 5g silver nitrate; 1g nickel sulfate; 2g sodium sulfite; 4g sodium thiosulfate; 2g aluminum chloride; 5g zinc chloride; sodium fluoroborate 5g; 0.2g of 1,2-naphthoquinone; add sulfuric acid with a concentration of 5g / L to adjust the pH to 1-1.5; the balance is water.

[0044] 2) According to the formula of the blackening treatment solution described in step 1), after weighing the reagent, put it into a beaker, stir and dissolve it completely, and obtain the blackening treatment solution of Example 3.

[0045] 3) Degrease the titanium-zinc plate workpiece and clean it with water; among them, the degreasing treatment is: mix 20g / L sodium carbonate, 25g / L sodium phosphate, and 4g / L OP-10 emulsifier at 65°C Next, process for 1min;

[0046] 4) Pickle the titanium-zinc plate treated in step 3) with a mixture of 1% hydrofluoric acid and 2% sulfuric acid for 1 second, and then w...

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Abstract

The invention discloses blackening liquid for a chromium-free titanium-zinc panel surface and a using method of the blackening liquid. Raw materials of the blackening liquid comprise a main salt, auxiliary components, a complexing agent, a pH conditioning agent and water, wherein the main salt is one or several of molybdate with the massic volume concentration of 5-40g / L or sodium tungstate with the massic volume concentration of 0.5-10g / L or copper sulfate with the massic volume concentration of 0.5-20g / L or silver nitrate with the massic volume concentration of 5-40g / L; the auxiliary components comprise nickel sulfate with the concentration of 1.0-4g / L, sodium sulfite with the concentration of 0.5-4g / L, sodium thiosulfate with the concentration of 1.0-5g / L, aluminium chloride with the concentration of 2.0-5g / L, zinc chloride with the concentration of 2.0-5g / L and fluoric acid with the concentration of 0-40g / L. A black protective layer of a titanium-zinc panel is obtained by a series of treatment of the titanium-zinc panel workpiece. The black protective layer of the titanium-zinc panel is compact, uniform, pitch-black and glossy and has the characteristics of being low in cost, chromium-free, environmental-friendly and the like, the performances of the titanium-zinc panel can reach the level of foreign products, and therefore, the titanium-zinc panel has relatively strong application prospect and market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and relates to a treatment solution for chromium-free blackening of the surface of titanium-zinc plates and a use method thereof. Background technique [0002] Titanium zinc plate is a new type of building roof panel material, which has been widely used in Europe. Titanium-zinc plate is an alloy, which is smelted by adding titanium and copper to high-purity zinc. The addition of copper can increase the mechanical strength and hardness of the alloy, reduce the expansion coefficient of the alloy material, and better adapt to the environment with large temperature differences. The addition of titanium can improve the creep resistance of the alloy, so that it will not cause metal fatigue after thermal expansion and contraction, so that the processing performance, creep resistance, corrosion resistance and ductility of the titanium-zinc plate are all improved. It has been greatly impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44C23C22/42C23C22/40C23C22/34C23C22/36C23C22/07C23C22/48
Inventor 唐谊平孙文声李宁
Owner ZHEJIANG UNIV OF TECH
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