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Rust transforming agent

A conversion agent and rust technology, which is applied in the coating process of metal materials, etc., can solve the problems of poor rust removal effect and unstable performance of existing conversion agents, and achieve the effects of improving service life, inhibiting cathodic reaction process, and inhibiting corrosion

Inactive Publication Date: 2011-09-21
ZHEJIANG OCEAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The performance of the existing conversion agent to be solved by the present invention is unstable and the rust removal effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Determine the composition ratio of the pre-treatment liquid and the post-treatment liquid, wherein the pre-treatment liquid is: 20 gram metal iron powder, 10 gram urotropine, 10 gram glycerin, 60 gram water; The post-treatment liquid is: 45.5 gram polyphosphoric acid, 37 gram of water, 3.5 grams of manganese carbonate, 9 grams of acetic acid, 5 grams of tannic acid.

[0034] configuration steps

[0035] Pre-treatment solution, configure 100 grams, follow the steps below:

[0036] 1. Add 60 grams of tap water to the beaker;

[0037] 2. Add 10 grams of urotropine and stir for 1 minute;

[0038] 3. Add 10 grams of glycerin and stir for 1 minute;

[0039] 4. Add 20 grams of pure iron and stir for 1 minute.

[0040] After treatment liquid, configure 100 grams, follow the steps below:

[0041] 1. Add 45.5 grams of polyphosphoric acid to the beaker;

[0042] 2. Add 37 grams of tap water and stir for 3 minutes, it will heat up;

[0043] 3. Add 9 grams of acetic acid and ...

Embodiment 2

[0048]Determine the composition ratio of the pre-treatment liquid and the post-treatment liquid, wherein the pre-treatment liquid is: 21 gram metal iron powder, 9 gram urotropine, 11 gram glycerin, 59 gram water; The post-treatment liquid is: 46 gram polyphosphoric acid, 38 gram of water, 3.5 grams of manganese carbonate, 8 grams of acetic acid, 4.5 grams of tannic acid.

[0049] configuration steps

[0050] Pre-treatment solution, configure 100 grams, follow the steps below:

[0051] 5. Add 59 grams of tap water to the beaker;

[0052] 6. Add 9 grams of urotropine and stir for 1 minute;

[0053] 7. Add 11 grams of glycerin and stir for 1 minute;

[0054] 8. Add 21 grams of pure iron and stir for 1 minute.

[0055] After treatment liquid, configure 100 grams, follow the steps below:

[0056] 5. Add 46 grams of polyphosphoric acid to the beaker;

[0057] 6. Add 38 grams of tap water, stir for 3 minutes, it will heat up;

[0058] 7. Add 8 grams of acetic acid and stir for...

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PUM

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Abstract

The invention discloses a rust transforming agent. The rust transforming agent consists of pre-treatment liquid and post treatment liquid, wherein the pre-treatment liquid is prepared from the following raw materials in percentage by weight: 19 to 22 percent of metal iron powder, 9 to 11 percent of urotropin, 9 to 11 percent of glycerol and 58 to 61 percent of water; the post treatment liquid is prepared from the following raw materials in percentage by weight: 45.5 to 47.5 percent of polyphosphoric acid, 37 to 40 percent of water, 2.5 to 3.5 percent of manganese carbonate, 8 to 10 percent of acetic acid and 4 to 5 percent of tannin. The preparation method comprises the following steps of: the preparation steps of the pre-treatment liquid, namely getting water in proportion, adding the urotropin into the water in proportion, adding the glycerol into the mixture in proportion, and adding the pure iron powder into the mixture in proportion; and the preparation steps of the post treatment liquid, namely adding the polyphosphoric acid in proportion, adding the water in proportion, adding the acetic acid in proportion, adding the manganese carbonate in proportion, adding the tannin in proportion, and stirring the mixture for 2 to 3 minutes. The using method of the rust transforming agent comprises the following steps of: brushing a relatively thin layer of pre-treatment liquid onto the surface of rusting iron and steel; spraying the post treatment liquid onto the rusting iron and steel one hour later; and staying the rusting iron and steel for 24 hours to obtain an integrated rust transforming film. The rust transforming agent is convenient to use and the rust-preventing period is long.

Description

technical field [0001] The invention relates to a rust remover, in particular to an iron rust conversion agent. Background technique [0002] Before the metal protective coating is coated, surface treatment is a very important link. If the pretreatment before coating can be omitted, and a new type of rust coating can be developed to stably transform the rusted steel surface, it will be a kind of Economical, convenient and environmentally friendly surface treatment technology. Before 1982, the main components of the rust conversion agent used by Kroller in the Soviet Union were phosphoric acid and potassium ferrocyanide. The production process was as follows: Potassium ferrocyanide K 4 (Fe(CN) 6 )·8H 2 O was ground and mixed little by little with phosphoric acid at a concentration of 75-80% and the mixture was stored for 24 hours. The reaction to form hydrocyanic acid occurs during the formulation of the mix. After the mixture is applied to the rusty surface, ferric hydr...

Claims

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Application Information

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IPC IPC(8): C23C22/05C23C22/07
Inventor 范细秋赵晓栋王维
Owner ZHEJIANG OCEAN UNIV
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