Acid etching treatment solution and treatment method for aluminum and aluminum alloy products

A treatment method and treatment liquid technology are applied in the acid etching treatment liquid and treatment field of aluminum and its alloy products, which can solve the problems of fast change of reaction rate, low treatment efficiency, and many generation, and achieve easy detection and analysis, easy control, The effect of simple ingredients

Inactive Publication Date: 2011-08-17
ZHEJIANG AXILONE SHUNHUA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the acid etching treatment in the current aluminum product industry uses ammonium bifluoride and other F-containing - Treatment liquid for treatment, this kind of acid etching treatment liquid reacts violently with the product, Al 3+ Generate more and faster, not easy to bring out, the reaction rate changes quickly, and the product quality is unstable; F - Difficult to detect, difficult to analyze and control the polishing solution; contains F - The treatment liquid is highly corrosive and will react with common metals and glassware. Generally, it cannot be used on automatic lines, but can only be applied on manual lines, resulting in low treatment efficiency.

Method used

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  • Acid etching treatment solution and treatment method for aluminum and aluminum alloy products
  • Acid etching treatment solution and treatment method for aluminum and aluminum alloy products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the preparation of 100L acid etching treatment liquid as an example, first pour 3 barrels of phosphoric acid (35Kg / barrel, mass fraction 85%) into the reaction kettle, then add 8L nitric acid (mass fraction 63%), and dissolve 500g with a small amount of hot water Ammonium acetate, 500g of copper acetate, and 1kg of carbonyl diamide are mixed into the above acid solution, and the temperature is raised to 100-110°C. At the same time, 1kg of "clean" (grease-removed) metal aluminum is added (add in 2-3 times) 10L of water was added in batches during the process of dissolving aluminum. After the aluminum was dissolved, a bucket of phosphoric acid was added, and the volume was fixed with water. The specific gravity was 1.68kg / L (measured at 80°C).

Embodiment 2

[0021] Taking the preparation of 100L acid etching treatment solution as an example, first pour 100kg of phosphoric acid (mass fraction 85%) into the reactor, then add 8L of nitric acid (mass fraction 63%), and dissolve 500g of ammonium acetate and 500g of acetic acid with a small amount of hot water. After copper and 1kg of carbonamide, mix them into the above acid solution, raise the temperature to 100-110°C, and add 1kg of "clean" (grease-removed) metal aluminum at the same time (adding in 2-3 times). A total of 12L of water was added in batches. After the aluminum was dissolved, a bucket of phosphoric acid was added, and the volume was adjusted with water. The specific gravity was 1.65kg / L (measured at 80°C).

Embodiment 3

[0023] Taking the preparation of 100L acid etching treatment solution as an example, first pour 95kg of phosphoric acid (mass fraction 85%) into the reactor, then add 6L of nitric acid (mass fraction 63%), and dissolve 1kg of ammonium acetate and 1kg of acetic acid with a small amount of hot water. Copper and 2kg of carbonyl diamide are mixed into the above acid solution, and the temperature is raised to 100-110°C. At the same time, 2kg of "clean" (grease-removed) metal aluminum is added (added in 2-3 times). Add water in batches to a total of 15L. After the aluminum is dissolved, add a bucket of phosphoric acid, and use water to make up the volume. The specific gravity is 1.60kg / L (measured at 80°C).

[0024] Treat 1070 drawn aluminum products with the above treatment solution:

[0025] Put the 1070 stretched aluminum middle beam (the lipstick tube part) in the acidic degreasing solution (phosphoric acid 35g / L, 2-butoxyethanol 70mL / L) for 1 minute, take it out and wash it wit...

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PUM

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Abstract

The invention discloses an acid etching treatment solution and a treatment method for aluminum and aluminum alloy products. The acid etching treatment solution has density of between 1.60 and 1.70kg / L; and 100L of acid etching treatment solution comprises the following raw materials: 130 to 150kg of phosphoric acid with mass fraction of between 80 percent and 90 percent, 8 to 12kg of nitric acid with mass fraction of between 60 percent and 70 percent, 1 to 3kg of Al, 2 to 4kg of stabilizer and 10 to 20L of water. The acid etching treatment solution is acidic and does not react with stainless steel (SUS-316L), titanium and alloy, so that the acid etching treatment solution can be applied to an automatic production line, comprises simple components, and is easy to detect and analyze and convenient to control.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal products, in particular to an acid etching treatment solution for aluminum and its alloy products and a treatment method. Background technique [0002] Most of the acid etching treatment in the current aluminum product industry uses ammonium bifluoride and other F-containing - Treatment liquid for treatment, this kind of acid etching treatment liquid reacts violently with the product, Al 3+ Generate more and faster, not easy to bring out, the reaction rate changes quickly, and the product quality is unstable; F - Difficult to detect, difficult to analyze and control the polishing solution; contains F - The treatment solution is highly corrosive and will react with common metal and glassware. Generally, it cannot be used in automatic lines, but can only be applied in manual lines, resulting in low treatment efficiency. Contents of the invention [0003] The invention provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/20
Inventor 朱升尧朱中军
Owner ZHEJIANG AXILONE SHUNHUA ALUMINUM IND
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