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A kind of treatment method to improve corrosion resistance of iron painting

A treatment method and corrosion resistance technology, applied in the coating process of metal materials, etc., can solve the problems of accelerating iron painting corrosion, damaging the appearance of iron painting, and many steps, so as to achieve the effect of improving corrosion resistance and improving corrosion resistance

Active Publication Date: 2021-07-30
安徽协同创新设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the existence of defects on the metal surface such as inclusions, microcracks, stress, etc. and the moisture and active ions (Cl - 、Br - etc.) will affect or even accelerate the corrosion of iron paintings to varying degrees, so that the storage time of iron paintings is short, which not only damages the beauty of iron paintings, but also seriously affects their value.
[0004] The application number 201610834818.2 published on January 11, 2017 is a method of anti-corrosion decoration on the surface of iron paintings and iron paintings. The disclosed anti-corrosion treatment method is: one-step phosphating treatment-two-step phosphating treatment, repeating the above steps 3-6 times, This method has many steps, and the anti-corrosion performance is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A treatment method for improving the corrosion resistance of iron paintings, comprising the following steps:

[0026] 1) After degreasing the completed iron painting, wash it with water and dry it naturally;

[0027] 2) Place the iron painting treated in step 1) in an organic phosphonate passivation solution, soak it for 20s at 20°C, take it out, and dry it naturally;

[0028] The preparation method of organic phosphonate passivation solution is as follows: add hydroxyethylidene diphosphonic acid, sodium molybdate and copper sulfate into water, stir and mix; the concentration of organic phosphonate is 25mg / L; The sodium concentration is 65mg / L; the copper sulfate concentration is 10mg / L.

[0029] 3), put the iron painting treated in step 2) in 0.6wt% 35°C urotropine solution, soak for 10s, take it out, and let it dry naturally;

[0030] 4) Put the iron painting treated in step 3) in 0.35wt% sodium metavanadate solution at 25°C, soak for 5s, take it out, and let it dry...

Embodiment 2

[0037] A treatment method for improving the corrosion resistance of iron paintings, comprising the following steps:

[0038] 1) After degreasing the completed iron painting, wash it with water and dry it naturally;

[0039] 2) Place the iron painting treated in step 1) in an organic phosphonate passivation solution, soak it for 18s at 25°C, take it out, and dry it naturally;

[0040] The preparation method of organic phosphonate passivation solution is: add diethylene triamine pentamethylene phosphonic acid, sodium molybdate and copper sulfate into water, stir and mix, and the concentration of organic phosphonate is 35mg / L ; The concentration of sodium molybdate is 90mg / L; the concentration of copper sulfate is 15mg / L.

[0041] 3) Place the iron painting treated in step 2) in 0.7wt% 40°C urotropine solution, soak for 5s, take it out, and let it dry naturally;

[0042] 4) Put the iron painting treated in step 3) in 0.4wt% sodium metavanadate solution at 30°C, soak for 5s, tak...

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Abstract

The invention provides a treatment method for improving the corrosion resistance of iron paintings. The completed iron paintings are passivated by organic phosphonates, and then treated with hexamethylene and sodium metavanadate. Compared with the prior art, the application controls the dosage ratio of organic phosphonate, sodium molybdate and copper sulfate in the organic phosphonate passivation solution, which is beneficial to exert synergistic effect. Organic phosphonate and molybdenum, copper, iron Plasma forms insoluble chelates and precipitates on the surface of the iron painting, thereby protecting the iron painting and improving the corrosion resistance of the iron painting. Then, through the adsorption of urotropine on the surface of the iron painting, a protective layer can be further formed on the surface of the iron painting, which isolates the contact between the iron painting and the outside world, and improves its corrosion resistance. Finally, the sodium metavanadate solution is used to passivate the iron painting, and play a synergistic effect with the aforementioned treatment to comprehensively improve the corrosion resistance of the iron painting.

Description

technical field [0001] The invention belongs to the field of iron painting production, and in particular relates to a treatment method for improving the corrosion resistance of iron paintings. Background technique [0002] Iron painting has absorbed the composition method of traditional Chinese painting and the techniques of gold and silver jewelry, paper-cutting, sculpture and so on. It uses low-carbon steel as raw material, uses iron instead of ink, and uses hammer instead of pen. Frame, frame and other processes, as well as the techniques of "knocking" and "drilling", are exquisitely formed into various works of art such as landscapes, figures, flowers, insects, fish, birds, and animals. It integrates various art techniques such as folk paper-cutting, carving, inlaying, etc., adopts the Chinese painting method, contrasts black and white, and combines virtual and real, which has a different taste. [0003] Due to the defects on the metal surface such as inclusions, microc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/42C23C22/50
CPCC23C22/42C23C22/50
Inventor 昝锐
Owner 安徽协同创新设计研究院有限公司