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Composite film chromium-free passivant

A technology of chromium-free passivation agent and composite film, applied in the direction of metal material coating process, etc., can solve the problems such as the inability of chromium-free passivation agent to meet the needs of the market, and achieve easy operation of passivation process, simple passivation process, The effect of excellent physical properties and corrosion resistance

Inactive Publication Date: 2010-11-17
JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although a variety of chromium-free passivators have appeared on the market in recent years, there is still a certain gap compared with the requirements of the current passivation industry for chromium-free passivators. The existing chromium-free passivators cannot meet the market requirements. need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Preparation of 100kg passivator

[0023] At a certain temperature, add 20 kg of water-based acrylic resin, 20 kg of water-based silica sol, 1 kg of phytic acid, 1 kg of sodium molybdate, 5 kg of water-soluble titanate, and the balance being water, and add them to the container and stir for 30 minutes.

Embodiment 2

[0024] Example 2: Preparation of 100kg passivator

[0025] At a certain temperature, add 10 kg of water-based acrylic resin, 10 kg of water-based polyurethane, 10 kg of water-based silica sol, 1 kg of phytic acid, 5 kg of sodium silicate, 5 kg of propylene glycol butyl ether, and the balance being water, and add them to the container and stir for 30 minutes.

Embodiment 3

[0026] Example 3: Preparation of 100kg passivator

[0027] At a certain temperature, add 10kg of water-based polyurethane, 10kg of water-based epoxy resin, 3kg of nano silica, 1kg of tannic acid, 1kg of sodium molybdate, 5kg of vinyl glycol ether, and the balance of water into the container and stir for 30min.

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Abstract

The invention relates to a composite film chromium-free passivant, which mainly comprises the following components of: a waterborne resin film-forming substance, an organic acid film-forming substance, an inorganic film-forming substance, a film-forming auxiliary agent, an additive, water and the like. The formula of the composite film chromium-free passivant is scientific and reasonable, does not comprise toxic and harmful substances such as chromium and the like, and meets the requirements of ROHS environmental protection laws and regulations which have been implemented by European Union since July 2006, so that the composite film chromium-free passivant is an environmentally-friendly chemical treatment agent. The composite film chromium-free passivant is suitable for hot galvanizing and electrogalvanizing post-processing technology, and the passivation process is simple and easy to operate. An organic and inorganic composite film is formed on the surface of a galvanized part after passivation by using the composite film chromium-free passivant. The composite film is colorless and transparent, has high corrosion resistance and can substitute for the traditional chromate to perform the passivation.

Description

Technical field [0001] The invention relates to a treatment agent for hot-dip galvanizing and electro-galvanizing passivation treatment. It is a new environmentally friendly passivation agent that can replace traditional chromate passivation. Background technique [0002] Galvanizing is an effective method to improve the resistance of steel to atmospheric corrosion. However, in a humid environment, the galvanized layer is prone to corrosion, forming white loose corrosive substances on the surface or turning into a gray color, which seriously affects the performance of galvanized parts. Therefore, the galvanized layer must be passivated to cover a protective film on the surface of the zinc layer. The traditional passivation process mostly uses chromate passivation. Chromate passivation is divided into hexavalent chromium passivation and trivalent chromium passivation, among which hexavalent chromium passivation is the most widely used due to its low price and good performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/40C23C22/42
Inventor 吕明春匡登云周汉涛郑建陈春雷邢丹丹
Owner JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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