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Photochemical treating fluid for pretreatment of aluminum or aluminum alloy surface, and chemical cleaning method

A technology for aluminum alloy surface and chemical cleaning, which is applied in the field of photochemical treatment liquid and chemical cleaning for aluminum alloy surface pretreatment, can solve the problems of unsatisfactory corrosion resistance of the plating layer, low production efficiency, environmental pollution, etc., and achieve environmental protection The effect of friendliness, close aluminum consumption and low aluminum consumption

Active Publication Date: 2017-08-11
哈尔滨哈船新材料科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention aims to solve the technical problems of polluting the environment, low production efficiency, high water consumption, and unsatisfactory corrosion resistance of the coating layer in the existing aluminum alloy chemical cleaning; and provides a photochemical treatment liquid for surface pretreatment of aluminum or aluminum alloy and chemical cleaning methods

Method used

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  • Photochemical treating fluid for pretreatment of aluminum or aluminum alloy surface, and chemical cleaning method
  • Photochemical treating fluid for pretreatment of aluminum or aluminum alloy surface, and chemical cleaning method
  • Photochemical treating fluid for pretreatment of aluminum or aluminum alloy surface, and chemical cleaning method

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specific Embodiment approach 1

[0031] Specific embodiment 1: The components in the photochemical treatment solution for surface pretreatment of aluminum or aluminum alloy in this embodiment and the concentration of each component:

[0032]

[0033] Rhein Chemie's water-based aluminum corrosion inhibitor RC5820 is produced by Aobe Technology (Shanghai) Co., Ltd.

[0034] The chemical cleaning method for pretreatment of alloy surface in this embodiment is carried out according to the following steps:

[0035] Step 1. Wipe the surface of aluminum or aluminum alloy with gasoline with a concentration of 25g / 500ml at a temperature of 50°C, and dry it for 15 minutes at 50°C;

[0036] Step 2. Then rinse twice with hot water at a temperature of 50°C, and each rinse time is 5 minutes;

[0037] Step 3. Then use a NaOH solution with a temperature of 65°C and a concentration of 25g / 500ml for alkaline washing for 15 minutes;

[0038] Step 4. Then rinse twice with hot water at a temperature of 30°C, and each rinse time is 5 minutes;...

specific Embodiment approach 2

[0041] Specific embodiment 2: The components in the photochemical treatment solution for surface pretreatment of aluminum or aluminum alloy in this embodiment and the concentration of each component:

[0042]

[0043] The chemical cleaning method for pretreatment of the alloy surface in this embodiment is operated according to the first embodiment.

[0044] Use the following test to verify the effect of the invention

[0045] 1. Potential polarization curve test, see the results figure 1

[0046] Using the potentiodynamic polarization curve, we can fit the linear part of the cathode and anode Tafel zone to obtain important parameters such as corrosion potential and corrosion current density (for the case of passivation zone, there are also passive current and passivation interval). , The fitting results are shown in Table 1.

[0047] Table 1 Polarization curve electrochemical parameters of aluminum alloy

[0048]

[0049] 2. SEM characterization such as figure 2

[0050] figure 2 It is...

specific Embodiment approach 3

[0057] Specific embodiment 3: The components in the photochemical treatment solution for surface pretreatment of aluminum or aluminum alloy in this embodiment and the concentration of each component:

[0058]

[0059] The chemical cleaning method for pretreatment of the alloy surface in this embodiment is operated according to the first embodiment.

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Abstract

A photochemical treating fluid for pretreatment of aluminum or aluminum alloy surface, and a chemical cleaning method belong to the technical field of aluminum alloy surface pretreatment. The invention aims to solve the technical problems of environmental pollution, low production efficiency, high water consumption and unsatisfactory corrosion resistance of coating in the existing aluminum alloy chemical cleaning method. The photochemical treating fluid comprises phytic acid, NaHF<2>, Fe(NO)<3>, RC5820 and triethanolamine oleate. The chemical cleaning method comprises the steps: firstly, wiping the aluminum or aluminum alloy surface with gasoline to remove oil and dry; secondly, washing with hot water; thirdly, alkaline washing; fourthly, washing with hot water; fifthly, photochemical treatment; sixthly, natural drying. In the invention, through treating the aluminum alloy surface with the chemical cleaning method, the corrosion resistance of the aluminum alloy surface is improved, and aluminum consumption is not much different; water consumption is reduced greatly, and the technological process is short; and the efficiency is high.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloy surface pretreatment; in particular, it relates to a photochemical treatment liquid for aluminum alloy surface pretreatment and a chemical cleaning method. Background technique [0002] Among the metal elements, aluminum and its alloys have high application value, such as low density, light weight, good electrical conductivity, and good thermal conductivity. Because of these advantages, aluminum and aluminum alloys have been widely used in industrial production. With the development of modern industry, the surface treatment requirements for aluminum and aluminum alloys are constantly increasing. Anodizing and chemical oxidation are currently the two most popular aluminum alloy surface treatment processes. Ease of operation and low cost are the reasons why the chemical conversion method has attracted much attention. The application prospects of aluminum and its alloys in the transportation indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03C23G1/12C23G1/04
CPCC23F3/03C23G1/04C23G1/125
Inventor 邵亚薇孙艳解光胜吕文静张明明师超郑宏鹏
Owner 哈尔滨哈船新材料科技有限公司
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