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Phosphorus-free nitrogen-free environment-friendly metal surface film treating agent and application thereof

A metal surface and thin film treatment technology, applied in the direction of metal material coating process, etc., can solve the problems of environmental pollution caused by discharge, large waste liquid content, etc., and achieve the effects of saving energy, inhibiting corrosion, and increasing the effect of corrosion inhibition

Active Publication Date: 2021-10-19
SHENYANG PARKERIZING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing treatment technologies that replace phosphorus or chromium are mainly zirconium and titanium treatment, metal vitrification treatment, and silanization treatment. However, these treatment technologies contain a large amount of nitrogen, resulting in a large amount of waste liquid containing nitrogen, the discharge will pollute the environment, and there is a problem of wastewater treatment

Method used

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  • Phosphorus-free nitrogen-free environment-friendly metal surface film treating agent and application thereof
  • Phosphorus-free nitrogen-free environment-friendly metal surface film treating agent and application thereof
  • Phosphorus-free nitrogen-free environment-friendly metal surface film treating agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) A non-phosphorus, nitrogen-free and environment-friendly metal surface film treatment agent, consisting of a main treatment agent. The composition of the main treatment agent is shown in Table 1.

[0030] Table 1

[0031]

[0032] (2) Preparation method

[0033] According to Table 1, the raw materials are mixed evenly under stirring conditions.

[0034] (3) Application

[0035] Methods as below:

[0036] 1. Use 20% sodium hydroxide to adjust the pH of the main treatment agent to 4.0.

[0037] 2. Pretreatment: Degrease the cold-rolled sheet, and then wash it with industrial water and deionized water in sequence.

[0038] 3. Soak the pretreated metal substrate in the main treatment agent with a pH of 4.0, soak for 3 minutes at room temperature, perform a chemical conversion reaction, wash with water, and dry to obtain a phosphorus-free and nitrogen-free chemical on the surface of the metal substrate. conversion coating.

Embodiment 2

[0040] (1) A non-phosphorus, nitrogen-free and environment-friendly metal surface film treatment agent, consisting of a main treatment agent and a pretreatment agent. The composition of main treatment agent and pretreatment agent is shown in Table 2.

[0041] Table 2

[0042]

[0043] (2) Preparation method

[0044] Preparation of the main treatment agent: According to Table 2, mix the raw materials of the main treatment agent evenly under stirring conditions.

[0045] Preparation of the pretreatment agent: According to Table 2, the raw materials of the pretreatment agent are mixed evenly under stirring conditions.

[0046] (3) Application

[0047] Methods as below:

[0048] 1. Use 20% sodium hydroxide to adjust the pH of the main treatment agent to 4.5. The pH of the pretreatment agent was adjusted to 4.0 with sodium hydroxide with a concentration of 20% by mass.

[0049] 2. Pretreatment: Degrease the cold-rolled sheet, and then wash it with industrial water and deio...

Embodiment 3

[0053] (1) A non-phosphorus, nitrogen-free and environment-friendly metal surface film treatment agent, consisting of a main treatment agent and a pretreatment agent. The composition of main treatment agent and pretreatment agent is shown in Table 3.

[0054] table 3

[0055]

[0056] (2) Preparation method

[0057] Preparation of the main treatment agent: According to Table 3, mix the raw materials of the main treatment agent evenly under stirring conditions.

[0058] Preparation of the pretreatment agent: according to Table 3, mix the raw materials of the pretreatment agent evenly under stirring conditions.

[0059] (3) Application

[0060] Methods as below:

[0061] 1. Use 20% sodium hydroxide to adjust the pH of the main treatment agent to 3.8. The pH of the pretreatment agent was adjusted to 5.0 with sodium hydroxide with a concentration of 20% by mass.

[0062] 2. Pretreatment: Degrease the cold-rolled sheet, and then wash it with industrial water and deionized ...

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Abstract

The invention discloses a phosphorus-free nitrogen-free environment-friendly metal surface film treating agent. The treating agent comprises a main treating agent and a pretreating agent, and the main treating agent is composed of hexafluorozirconic acid, hydrofluoric acid, organic acid, aluminum hydroxide, a magnesium compound, a zinc compound, sodium tungstate, polyepoxysuccinic acid and deionized water. The pretreating agent is composed of cerous sulfate or cerous acetate, the hydrofluoric acid, sodium dodecyl sulfate, sodium xylene sulfonate, EDTA-2Na or EDTA-4Na and the deionized water. The metal film treating agent forms an organic-inorganic composite film layer with a metal surface through zirconium formation and organic polymer association, has excellent binding force with a coating, has good corrosion resistance, is free of phosphorus and nitrogen, does not generate wastewater and waste residues containing ammonia nitrogen or heavy metal and can be used at normal temperature, the energy is saved, and the environment is protected.

Description

technical field [0001] The invention relates to a metal material surface chemical formation treatment agent, in particular to a phosphorus-free and nitrogen-free metal surface film treatment agent and application thereof. Background technique [0002] Before painting or decoration, the metal surface must be pre-painted to improve the corrosion resistance and the bonding force with the paint, because the chromate chemical conversion technology and the zinc phosphate chemical conversion technology have mature technology and stable effect characteristics and are widely used. However, since the chromate treatment agent contains chromium and the zinc phosphate treatment agent contains phosphorus, and heat treatment is required, and both of them will cause pollution to the environment, there is also energy loss, and the treatment of waste water and waste residue requires a lot of cost, so gradually replaced. Therefore, there is an urgent need for an environmentally friendly chem...

Claims

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Application Information

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IPC IPC(8): C23C22/44C23C22/78
CPCC23C22/44C23C22/78
Inventor 李娜娜周宪民张洋张蕾田润生孙明远
Owner SHENYANG PARKERIZING
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