Chromium-free passivation liquid for treating tin-plated steel plate

A technology of chrome-free passivation and tin-plated steel, which is applied in anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., and can solve problems such as polluting the environment, endangering human health, and high toxicity of hexavalent chromium

Inactive Publication Date: 2014-05-21
上海丰野表面处理剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hexavalent chromium contained in chromate is very toxic,

Method used

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  • Chromium-free passivation liquid for treating tin-plated steel plate
  • Chromium-free passivation liquid for treating tin-plated steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Ammonium fluozirconate 1.32g, potassium fluotitanate 5.4g, cobalt nitrate 4.94g, add water to dissolve in 1L, in which zirconium content is 0.5g / L, titanium and cobalt content are both 1.0g / L, then add commercially available 5.0 g of water-soluble acrylic cationic resin was stirred and mixed evenly, and finally 86 wt % of phosphoric acid was added to adjust the final pH to 3.0.

Embodiment 2

[0031] Ammonium fluozirconate 2.65g, potassium fluotitanate 5.4g, cobalt nitrate 4.94g, add water to dissolve in 1L, wherein zirconium content is 1.0g / L, titanium and cobalt content are both 1.0g / L. Subsequently, 5.0 g of a commercially available water-soluble acrylic cationic resin was added, fully stirred and mixed evenly, and finally 86 wt % of phosphoric acid was added to adjust the final pH to 3.0.

Embodiment 3

[0033] Ammonium fluozirconate 13.23g, potassium fluotitanate 5.4g, cobalt nitrate 4.94g, add water to dissolve in 1L, wherein zirconium content is 5.0g / L, titanium and cobalt content is 1.0g / L. Subsequently, 5.0 g of a commercially available water-soluble acrylic cationic resin was added, fully stirred and mixed evenly, and finally 86 wt % of phosphoric acid was added to adjust the final pH to 3.0.

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Abstract

The present invention discloses a chromium-free passivation liquid for treating a tin-plated steel plate, wherein the pH value of the chromium-free passivation liquid is 3-4. The chromium-free passivation liquid comprises an inorganic compound containing at least one selected from silicon, titanium and zirconium, a metal compound containing at least one selected from aluminum, vanadium, manganese, cobalt, nickel and molybdenum, a soluble resin, an acid for adjusting the pH value of the passivation liquid to 3-4, and the balance of water and other unavoidable impurities, wherein the contents of silicon, titanium and zirconium are 0.1-20 g/L, the contents of aluminum, vanadium, manganese, cobalt, nickel and molybdenum are 0.1-20 g/L, and the soluble resin content is 0.1-20 g/L. The tin-plated steel plate treated by the chromium-free passivation liquid obtained with the technical scheme has characteristics of excellent corrosion resistance, excellent sulfurization resistance, excellent coating material adhesion and excellent processability.

Description

technical field [0001] The invention relates to a composition, in particular to a passivation solution. Background technique [0002] Tin plate is one of the important packaging materials. It has certain strength and plasticity, is easy to form, has good solderability, paintability and corrosion resistance, and has a bright appearance. It is widely used in light industry , electronics, electrical appliances, instruments and other industries, in addition to being widely used in the production of food cans. Food cans are usually packaged in tinplate (tinplate) paint cans. Since livestock (poultry) meat is rich in protein and amino acids, during the process of sterilization and storage, some black substances are often formed on the inner wall of the can, and even contaminate the contents. Because these black substances are mainly sulfur-containing compounds, they are called sulfur blackening. The principle is that the sulfur-containing components in the contents of low-acid ...

Claims

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Application Information

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IPC IPC(8): C23C22/06C23C22/36C23C22/47C25D11/00C25D11/34
Inventor 饶晓霞
Owner 上海丰野表面处理剂有限公司
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