Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Rapid zinc series, zinc-calcium series or iron series clean phosphatizing liquid under room-temperature with multiple styles

A multi-mode, clean technology, applied in the direction of metal material coating process, etc., can solve the problems of poor phosphating quality, affecting the quality of phosphating film, and many sediments, so as to achieve stable phosphating solution, save preparation time, and save energy. Effect

Inactive Publication Date: 2008-04-23
余取民
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the phosphating solution used for spraying pretreatment generally needs to be washed with water after phosphating, otherwise the phosphating film will hang ash and the decomposition product of the accelerator in the phosphating solution (such as Cl after the reaction of sodium chlorate) - 、Na + Ions, additives (such as F - ions or fluorides) significantly affect the quality of the phosphating film; the phosphating temperature is basically above 15°C, and heating is generally required in winter; room temperature phosphating solution accelerators generally contain toxic Ni (nickel) and Cr (chromium) and carcinogenic and harmful Decomposition produces toxic gas nitrogen oxides (NO x ) of nitrite, poor phosphating quality, etc.; more sediment in the phosphating process, phosphating 1m 2 Produce several grams or more of sediment

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

[0064] Phosphating solution formula: ammonium dihydrogen phosphate [NH 4 H 2 PO 4 ]: 33.5g·L -1 ; Ammonium heptamolybdate [(NH 4 ) 6 Mo 7 O 24 ·4H 2 O]: 8.5g·L -1 ; Phytic acid (C 6 H 18 O 24 P 6 ): 3.0g·L -1 ; Nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O]: 13.50g·L -1 ; Use ammonia (NH 3 ·H 2 O) Adjust the pH value to 5.0.

[0065] Phosphating situation and results: Brush the test piece with working solution at 10℃, and then bake it at 120℃ for 10min. After 30min, the corrosion resistance time is 220s, after 12h (hour), it is 320s; the adhesion reaches level 1.

Embodiment 2

[0067] Phosphating solution formula: zinc dihydrogen phosphate [Zn(H 2 PO 4 ) 2 ]: 27.8g·L -1 ; Ammonium heptamolybdate: 8.1g·L -1 ; Phytic acid: 1.0g·L -1 ; Calcium nitrate [Ca(NO 3 ) 2 ]: 5.8g·L -1 ; Ammonium Nitrate [NH 4 NO 3 ]: 2.1g·L -1 ; Adjust the pH to 2.4 with ammonia.

[0068] Phosphating situation and results: 15℃, immerse the test piece in the phosphating working solution, take it out after 5min and bake it at 120℃ for 8min, after 30min, the corrosion resistance time is 120s, the film weight is 1.25g·m -2 , Adhesion reaches level 1.

Embodiment 3

[0070] Phosphating solution formula: diammonium hydrogen phosphate [(NH 4 ) 2 HPO 4 ]:16.0g·L -1 ; Ammonium nitrate: 4.5g·L -1 ; Ammonium heptamolybdate: 8.0g·L -1 ; Use phosphoric acid (85% H 3 PO 4 ) Adjust the pH to 3.5.

[0071] Phosphating situation and results: immerse the test piece in the phosphating working solution at 10℃ for 5min, take it out and bake it at 120℃ for 10min, after 30min, the corrosion resistance time is 138s, and the film weight is 0.81g·m -2 , Adhesion reaches level 1.

[0072] The invention is suitable for phosphating treatment before spraying on the surface of steel such as cold rolled plate, hot rolled plate and angle steel. Phosphating solution is composed of phosphoric acid, nitric acid or its ammonium, zinc, calcium, nickel, manganese salt and ammonium molybdate, ammonium tungstate, phytic acid, hydrogen peroxide, etc., and does not contain carcinogenic and decomposed toxic gas NO x The nitrite does not contain toxic Cr salts, and it does not conta...

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
adhesivityaaaaaaaaaa
Login to View More

Abstract

A phosphate solution of Zn Zn-Ca and Fe series. Contents of it are H3PO4, nitrate and their Zn2+,Ca2+,Mn2+,Ni2+ salts, ammonium molybdate, ammonium wolframate, phytic acid, H2O2 and non-ionic surface active agent. pH is 2.0-5.8.

Description

Technical field [0001] The invention belongs to the technical field of phosphating treatment before spraying on the surface of steel, and relates to a multi-mode, rapid room temperature zinc-based or zinc-calcium-based or iron-based clean phosphating solution. Background technique [0002] Phosphating treatment has a history of more than 100 years. It is a process in which metal workpieces are treated in a solution containing metal or ammonium dihydrogen phosphate and accelerators as the main components, and a phosphating film is formed on the surface of the metal to be treated. The phosphating film has the functions of increasing the adhesion, corrosion resistance, protection, friction reduction and lubrication of the coating. Phosphating solution can be divided into zinc series, manganese series and iron series according to the film-forming cations. [0003] Phosphating, when the surface of steel contacts the phosphating solution, the following reactions occur: [0004] Fe+[O]+...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/42
CPCC23C22/42
Inventor 余取民
Owner 余取民
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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