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

Thick film phosphating method

A thick film and phosphating solution technology, which is applied in the coating process of metal materials, etc., can solve the problems of rough surface, uneven film thickness, low hardness, etc., and achieve smooth and fine surface, high film thickness and short reaction time short effect

Inactive Publication Date: 2012-07-04
ANHUI QIMING SURFACE TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large workpieces, the cost of traditional phosphating treatment is too high, and the film forming time is long, the film is loose, the film thickness is uneven, the hardness is not high, the surface is not smooth, and the corrosion resistance is poor, especially not suitable for gears. Phosphating of precision workpieces

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

[0029] The phosphating solution of this embodiment includes 6.5% of Maziv's salt, 2% of zinc nitrate, 0.5% of phosphoric acid, 0.2% of sodium fluoborate and 0.01% of ferric nitrate, and the balance is water, by weight. The present embodiment free acidity is 11.7 points, and total acidity is 84 points. Take 10ml of phosphating solution, add two to three drops of bromophenol blue indicator dropwise, and use 0.1mol / L NaOH solution to neutralize to purple. The volume (ml) consumed is the point of free acidity; Drop phenolphthalein indicator, and continue to use 0.1mol / L NaOH solution to neutralize to red. The total volume (ml) of all NaOH solution consumed is the total acidity point.

[0030] The phosphating process includes the following steps:

[0031] (1) Use pre-degreasing and degreasing treatment to remove oil stains on the surface of the workpiece and then wash with water;

[0032] (2) Pickle the surface of the workpiece after degreasing, specifically pickling with hydroch...

Embodiment 2

[0039] The phosphating solution of this embodiment includes 5% of Maziv's salt, 1.5% of zinc nitrate, 0.65% of phosphoric acid, 0.1% of sodium fluoborate and 0.03% of ferric nitrate, and the balance is water, by weight. The present embodiment free acidity is 16.5 points, and total acidity is 105.5 points.

[0040] The phosphating process includes the following steps:

[0041] (1) Use pre-degreasing and degreasing treatment to remove oil stains on the surface of the workpiece and then wash with water;

[0042] (2) Pickle the surface of the workpiece after degreasing, specifically pickling with hydrochloric acid for 3 minutes, and then pickling with phosphoric acid for 5 minutes;

[0043] (3) Wash the workpiece with water, and wash the workpiece to PH=7 under normal temperature conditions;

[0044] (4) Then adjust the workpiece with titanium salt for 60 seconds, keep the pH value at 9, and the concentration of titanium salt surface adjustment is 0.1% to 0.2%;

[0045] (5) Put...

Embodiment 3

[0050] The phosphating solution of the present embodiment comprises 5% of Mariv's salt, 2.5% of zinc nitrate, 0.35% of phosphoric acid, 0.3% of sodium fluoborate, 0.02% of ferric nitrate and 0.01% of ethylenediaminetetraacetic acid, and the balance is water, by weight count. The present embodiment free acidity is 10.5 points, and total acidity is 74 points.

[0051] The phosphating process includes the following steps:

[0052] (1) Use pre-degreasing and degreasing treatment to remove oil stains on the surface of the workpiece and then wash with water;

[0053] (2) Pickle the surface of the workpiece after degreasing, specifically pickling with hydrochloric acid for 3 minutes, and then pickling with phosphoric acid for 5 minutes;

[0054] (3) Wash the workpiece with water, and wash the workpiece to PH=7 under normal temperature conditions;

[0055] (4) Then adjust the workpiece with titanium salt for 45 seconds, keep the pH value at 10, and adjust the concentration of titan...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a thick film phosphating method. The method comprises the following steps of: removing oil stain on the surface of a workpiece and washing with water; washing the surface subjected to oil stain removal by using acid; washing the workpiece with water; carrying out surface conditioning on the workpiece by using a titanium salt; putting the workpiece subjected to surface conditioning in a phosphating solution for phosphating processing; and washing the workpiece. The workpiece provided by using the thick film phosphating method has higher film forming thickness, smooth and fine surface and no rust after a salt spray test; meanwhile the thick film phosphating method disclosed by the invention has the advantages of short reaction time and strong corrosion resistance, can meet the thickness requirements of different phosphate films, and is suitable for the phosphating requirements of the workpiece with high corrosion and high hardness; and the workpiece can meet the process requirements in a small-scale test and an intermediate-scale test.

Description

technical field [0001] The invention relates to a phosphating treatment method for the inner wall of an oil tank, in particular to a thick film phosphating method. Background technique [0002] Phosphating treatment is a treatment method that chemically reacts metal with phosphoric acid or phosphate to form a stable phosphate film on its surface. Treating workpieces with traditional phosphating solutions consumes a lot of energy and takes a long time. For large workpieces, the cost of traditional phosphating treatment is too high, and the film forming time is long, the film is loose, the film thickness is uneven, the hardness is not high, the surface is not smooth, and the corrosion resistance is poor, especially not suitable for gears. Phosphating of precision workpieces. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a thick-film phosphating method, which is easy to use and improves th...

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): C23C22/07C23C22/36
Inventor 孟强徐成龙闫永丽刘小琳李磊朱庆成
Owner ANHUI QIMING SURFACE TECH
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