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

Steel fastener material double-layer protection method using surface blackening and organic coating

An organic coating, surface blackening technology, applied in metal material coating process, device for coating liquid on the surface, coating, etc. Excellent performance, the effect of solving poor corrosion resistance

Inactive Publication Date: 2019-08-23
江苏赛清科技有限公司 +1
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address some surface protection methods such as electroplating, chemical plating, and composite coatings, which cannot meet the requirements of fasteners used in relatively harsh environments.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, prepare the samples, degrease the steel fasteners in an alkaline degreasing solution, then wash them with a large amount of water, then derust them in an acidic descaling solution, wash and dry them with a large amount of water.

[0025] The degreasing liquid is composed of sodium hydroxide, sodium carbonate, trisodium phosphate, sodium silicate, and OP-10 emulsifier. The contents of each component are as follows:

[0026] Sodium hydroxide 10g / L; sodium carbonate 20g / L; trisodium phosphate 50g / L; sodium silicate 5g / L; OP-10 emulsifier 0.2g / L; the rest is water.

[0027] Rust removal solution is made by mixing hydrochloric acid and nitric acid, and the content of each component is as follows:

[0028] Hydrochloric acid 5g / L; nitric acid 15g / L.

[0029] Then, soak the fastener in the blackening solution for 2 hours. The composition of the blackening solution is as follows:

[0030] Copper sulfate 10g / L; nickel sulfate 5g / L; zinc dihydrogen phosphate 4g / L; phospho...

Embodiment 2

[0037] First, prepare the samples, degrease the steel fasteners in an alkaline degreasing solution, then wash them with a large amount of water, then derust them in an acidic descaling solution, wash and dry them with a large amount of water.

[0038] The degreasing liquid is composed of sodium hydroxide, sodium carbonate, trisodium phosphate, sodium silicate, and OP-10 emulsifier. The contents of each component are as follows: sodium hydroxide 10g / L; sodium carbonate 50g / L; triphosphate Sodium 60g / L; sodium silicate 7g / L; OP-10 emulsifier 3g / L; the rest is water.

[0039] The derusting liquid is made by mixing hydrochloric acid and nitric acid, and the content of each component is as follows: hydrochloric acid 10g / L; nitric acid 10g / L.

[0040] Then, soak the fastener in the blackening solution for 1.5h. The composition of the blackening solution is as follows: copper sulfate 15g / L; nickel sulfate 4g / L; zinc dihydrogen phosphate 3g / L; phosphoric acid 2g / L; complexing agent 5g...

Embodiment 3

[0047] First, prepare the samples, degrease the steel fasteners in an alkaline degreasing solution, then wash them with a large amount of water, then derust them in an acidic descaling solution, wash and dry them with a large amount of water.

[0048] The degreasing liquid is composed of sodium hydroxide, sodium carbonate, trisodium phosphate, sodium silicate, and OP-10 emulsifier. The contents of each component are as follows: sodium hydroxide 10g / L; sodium carbonate 50g / L; triphosphate Sodium 60g / L; sodium silicate 7g / L; OP-10 emulsifier 3g / L; the rest is water.

[0049] The derusting liquid is made by mixing hydrochloric acid and nitric acid, and the content of each component is as follows: hydrochloric acid 10g / L; nitric acid 10g / L.

[0050] Then, the fastener is immersed in the blackening solution for 3 hours, and the blackening solution is composed as follows: copper sulfate 14g / L; nickel sulfate 4g / L; zinc dihydrogen phosphate 4g / L; phosphoric acid 3g / L; complexing agen...

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 surface protection technology for steel fastener materials, in particular to a steel fastener material double-layer protection method using surface blackening and an organiccoating. The method comprises the steps: performing degreasing and rust removal on a fastener, then immersing the fastener in a blackening liquid for 10-20 minutes so as to form an oxide film layer,performing water washing, and then applying organic paint so as to form the organic coating. The problems that current electroplating, electroless plating, organic coating and other surface protectionmethods have complicated and harsh pretreatment, thick coatings, serious pollution and common anti-corrosion performance are solved. The surface treatment technology which adopts double protection ofblackening treatment and the organic coating has thin coatings, a simple process and low cost, no complicated pretreatment is required, and the neutral salt spray corrosion resistance of the coatingis improved to a large extent on the premise of ensuring excellent adhesion between the coating and a substrate.

Description

technical field [0001] The invention relates to surface protection technology of fasteners, in particular to a method applied to surface blackening treatment of steel fastener materials and double-layer protection of organic coatings. Background technique [0002] The marine environment is one of the most corrosive environments in nature, and most metal materials are not resistant to seawater, ocean and atmospheric corrosion. Many threaded fasteners exposed to the marine environment for a long time have very serious corrosion. Corrosion makes it difficult to disassemble the fasteners, reduce the connection strength, or even lose them, which causes great difficulties for the normal service and maintenance of the fasteners, and Fasteners have size issues and cannot be protected with thicker coatings. [0003] Through the analysis of fastener materials, structural characteristics, service conditions and other factors, combined with the corrosion characteristics of the marine e...

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): C09D163/00C09D5/10C09D7/61C09D127/12C09D7/65C09D133/04B05D7/14B05D7/24C23C22/12C23C22/17
CPCB05D7/14B05D7/24C08K2003/0812C08K2003/0881C08K2003/3009C09D5/10C09D5/103C09D7/61C09D7/65C09D127/12C09D133/04C09D163/00C23C22/12C23C22/17C08K3/08C08K3/30C08L27/18
Inventor 李庆鹏彭辉
Owner 江苏赛清科技有限公司
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