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Chromate-free passivation agent for tin-plated steel plate and preparation method of chromate-free passivation agent

A technology of chromium-free passivating agent and tin-plated steel plate, which is applied in the coating process of metal materials, etc., can solve the problems of high cost of passivating agent, unsatisfactory passivating effect, and no chromium-free passivating agent. The effect of low equipment requirements, excellent appearance and quality, and excellent oxidation resistance

Active Publication Date: 2016-09-21
江苏友富薄板科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing chromium-free passivators either use molybdate as the main component or rare earth metal salts as the main component, but the cost of these passivators is relatively high, and the passivation effect is not ideal, which cannot fully meet the needs of the industry. Market demand
So far, there is no chromium-free passivating agent that is really satisfactory and has a better market prospect in this technical field

Method used

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  • Chromate-free passivation agent for tin-plated steel plate and preparation method of chromate-free passivation agent

Examples

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Effect test

Embodiment 1

[0022] A chromium-free passivator for tin-plated steel sheets, including the following raw materials in parts by mass: 22 parts of sodium phytate, 6 parts of benzotriazole, 5 parts of sodium carboxymethylcellulose, and 13 parts of rosin-modified phenolic resin 15 parts of concentrated polytetrafluoroethylene dispersion, 4 parts of sodium dodecylbenzenesulfonate, 15 parts of ethanol, and 18 parts of water, wherein the solid content of the concentrated polytetrafluoroethylene dispersion is 58%.

[0023] The preparation method of the chromium-free passivating agent for tin-plated steel sheet described above may further comprise the steps:

[0024] (1) Add carboxymethyl cellulose sodium into water earlier, stir evenly, obtain transparent colloidal solution;

[0025] (2) Add benzotriazole into ethanol, stir evenly, continue to add sodium phytate, rosin-modified phenolic resin and sodium dodecylbenzenesulfonate, and stir at 90r / min for 1-2h to obtain mixture A;

[0026] (3) Add the...

Embodiment 2

[0028] A chromium-free passivator for tin-plated steel sheets, including the following raw materials in parts by mass: 26 parts of sodium phytate, 9 parts of benzotriazole, 7 parts of sodium carboxymethylcellulose, and 15 parts of rosin-modified phenolic resin 18 parts of concentrated polytetrafluoroethylene dispersion, 6 parts of sodium dodecylbenzenesulfonate, 18 parts of ethanol, and 21 parts of water, wherein the solid content of the concentrated polytetrafluoroethylene dispersion is 59%.

[0029] The preparation method of the chromium-free passivating agent for tin-plated steel sheet described above may further comprise the steps:

[0030] (1) Add carboxymethyl cellulose sodium into water earlier, stir evenly, obtain transparent colloidal solution;

[0031] (2) Add benzotriazole into ethanol, stir evenly, continue to add sodium phytate, rosin-modified phenolic resin and sodium dodecylbenzenesulfonate, stir at 95r / min for 1-2h, and obtain mixture A;

[0032] (3) Add the t...

Embodiment 3

[0034] A chromium-free passivator for tin-plated steel sheets, including the following raw materials in parts by mass: 30 parts of sodium phytate, 11 parts of benzotriazole, 8 parts of sodium carboxymethylcellulose, and 17 parts of rosin-modified phenolic resin , 20 parts of polytetrafluoroethylene concentrated dispersion, 9 parts of sodium dodecylbenzenesulfonate, 21 parts of ethanol, and 25 parts of water, wherein the solid content of the polytetrafluoroethylene concentrated dispersion is 60%.

[0035] The preparation method of the chromium-free passivating agent for tin-plated steel sheet described above may further comprise the steps:

[0036] (1) Add carboxymethyl cellulose sodium into water earlier, stir evenly, obtain transparent colloidal solution;

[0037] (2) Add benzotriazole into ethanol, stir evenly, continue to add sodium phytate, rosin-modified phenolic resin and sodium dodecylbenzenesulfonate, and stir at 100r / min for 1-2h to obtain mixture A;

[0038] (3) Add...

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Abstract

The invention relates to a chromate-free passivation agent for a tin-plated steel plate and a preparation method of the chromate-free passivation agent, and belongs to the technical field of metal surface treatment. The chromate-free passivation agent for the tin-plated steel plate comprises the following raw materials in parts by mass: 22-38 parts of sodium phytate, 6-15 parts of benzotriazole, 5-12 parts of sodium carboxymethylcellulose, 13-20 parts of rosin modified phenolic resins,15-25 parts of polytetrafluoroethylene concentrated dispersing liquid, 4-13 parts of sodium dodecyl benzene sulfonate, 15-27 parts of ethanol, and 18-30 parts of water. The tin-plated steel plate treated by use of the chromate-free passivation agent is excellent in oxidation resistance, corrosion resistance and scraping resistance, not easy to blacken and excellent in appearance and quality.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a chromium-free passivator for tin-plated steel plates and a preparation method thereof. Background technique [0002] Since metals are prone to corrosion due to long-term exposure to air and moisture, passivation treatment is usually performed to improve corrosion resistance in order to form a protective film on the metal surface. [0003] The use of traditional hexavalent chromium passivators can effectively improve the corrosion resistance of metals, but hexavalent chromium is harmful to health and pollutes the environment, so it is gradually eliminated. Coupled with the implementation of the RoHS directive, people continue to study chromium-free passivators. The RoHS Directive, the "Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment", requires the use of lead (Pb), mercury (Hg), cadmium (Cd), and hexavale...

Claims

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Application Information

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IPC IPC(8): C23C22/05
CPCC23C22/05
Inventor 尤为
Owner 江苏友富薄板科技有限公司
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