Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Chromium-free metal surface treatment composition

A technology of metal surface treatment and composition, applied in the direction of metal material coating technology, etc., can solve the problems of high hydroxyl group content, limited popularization and application, poor system stability, etc., achieve good stability, improve production efficiency, and reduce curing The effect of temperature

Active Publication Date: 2013-04-17
CHINA NAT OFFSHORE OIL CORP +1
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, a variety of chromium-free metal surface treatment composition systems have been proposed at home and abroad. Among them, the organosilane system has the best corrosion resistance, which is equivalent to chromate. However, when the silane coupling agent is used as the main film-forming agent, after hydrolysis in water The content of hydroxyl groups is high, self-condensation is easy to occur, the system stability is poor, and the corrosion resistance is significantly reduced, which limits the popularization and application of silane system chrome-free treatment solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Chromium-free metal surface treatment composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the metal surface treatment composition is as follows:

[0036] Polydimethylsiloxane: 50g / L

[0037] Vinyltriacetoxysilane: 5g / L

[0038] Ce 3+ : 0.5 g / L

[0039] HEDP: Appropriately adjust the pH value to 4.0

[0040] Deionized water: balance

Embodiment 2

[0042] The composition of the metal surface treatment composition is as follows:

[0043] Polydimethylsiloxane: 75g / L

[0044] Vinyltriacetoxysilane: 7.5g / L

[0045] Ce 3+ : 0.5 g / L

[0046] HEDP: Appropriately adjust the pH value to 4.0

[0047] Deionized water: balance

Embodiment 3

[0049] The composition of the metal surface treatment composition is as follows:

[0050] Polydimethylsiloxane: 100g / L

[0051] Vinyltriacetoxysilane: 10g / L

[0052] Ce 3+ : 0.5 g / L

[0053] HEDP: Appropriately adjust the pH value to 4.0

[0054] Deionized water: balance

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a chromium-free metal surface treatment composition. The composition is characterized by comprising the following components: A) hydroxy-terminated water-soluble polydimethylsiloxane, B) silane coupling agent with alpha-functional group, C) bivalent or high-valent metal ions of Zr<2+>, Ca<2+>, Ce<3+> or Mo<6+> selected from at least one of Zr(CH3COO)2, Ca(CH3COO)2, Ce(NO3)3 and (NH4)6Mo7O24, D) pH regulator selected from at least one of hydroxyethylidene-1,1-diphosphonic acid, 2-phosphonic acid butane-1,2,4-tricarboxylic acid and amino trimethylene phosphonic acid, and E) deionized water, wherein the concentration range of the component A) is 50 to 100 g / L, the concentration range of the component B) is 2 to 10 g / L, the concentration range of the component C) is 0.2 to 5 g / L, and E) the balance of the component shown in the specification.

Description

[0001] technical field [0002] The invention relates to the technical field of metal surface treatment, and relates to a chromium-free metal surface treatment composition, which does not contain chromium and can form a chromium-free conversion film with good corrosion resistance on metal materials. Background technique [0003] Coated metal sheets (such as galvanized sheets, tinned sheets, galvanized sheets, etc.) have good corrosion resistance and are widely used in electronic products, aviation, automobiles, building materials, home appliances, machinery and other fields, but in humid environments , Plated metal is easily corroded, and chromate is widely used as a corrosion inhibitor in the metal surface treatment industry. However, hexavalent chromium is toxic and carcinogenic, so developed countries have issued relevant regulations to restrict the use of hexavalent chromium. Therefore, it is the general trend to research and develop products that can replace chromate ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C22/48
Inventor 叶学海刘红光张春丽张晓波傅春明于晓微
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com