GB963128A - Improvements in or relating to the formation of chemical conversion coating upon metal surfaces - Google Patents

Improvements in or relating to the formation of chemical conversion coating upon metal surfaces

Info

Publication number
GB963128A
GB963128A GB11328/63A GB1132863A GB963128A GB 963128 A GB963128 A GB 963128A GB 11328/63 A GB11328/63 A GB 11328/63A GB 1132863 A GB1132863 A GB 1132863A GB 963128 A GB963128 A GB 963128A
Authority
GB
United Kingdom
Prior art keywords
litre
amine
concentration
gms
nitrite ion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB11328/63A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel Corp
Original Assignee
Amchem Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amchem Products Inc filed Critical Amchem Products Inc
Publication of GB963128A publication Critical patent/GB963128A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/10—Orthophosphates containing oxidants

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Iron and steel surfaces are phosphated with aqueous acidic alkali metal (to include ammonium mono-hydrogen- and ammonium dihydrogen-) phosphate solutions containing nitrite ion (NO2-) and an amine compound of general formula HNR1R2; where R1, R2 the same or not, each being a saturated straight or branched alkyl or o -hydroxyalykyl group having 2-4 carbon atoms: when the amine concentration ranges from 0.3-1.0 gms./litre the <FORM:0963128/C6-C7/1> and when the amine exceeds 1.0 gm./litre [NO2-] ranges from 0.3/amine m.w. X 46 to 10.0 gms./ litre. The pH of the solutions ranges from 4.0-5.8, preferably 4.5-5.7. The temperature is at least 120 DEG F. (49 DEG C.), the operating range being 120-150 DEG F. (49-66 DEG C.) and preferably 130-145 DEG F. (57-63 DEG C.). The amines comprise diethyl amine, di-2-ethanolamine, di-i-propanolamine, di-butylamine, di-i-propylamine and di-butanol-amines. Coating time varies between 30 seconds and 5 minutes, preferably 1-3 minutes. Concentration of the nitrite ion varies directly with respect to concentration of the amine compound up to 1.0 gm./litre of the latter as prescribed by the above formula. For amine contents in excess of 1.0 gm./litre the nitrite ion concentration may rise to a maximum of 10 gms./litre. 30 gms./litre or more of amine may be used as determined only by solubility considerations but in practice quantities are limited to 1.0 gm./litre. The nitrite ion may be introduced as a salt of alkali or alkaline earth metals, preferably NaNO2. Although at least 0.3 gm./litre of amine compound must be incorporated in the solutions, it is preferred to use 0.5 gm./litre of amine as the practical minimum concentration due to drag-out losses. A wetting agent may be incorporated.
GB11328/63A 1962-04-04 1963-03-21 Improvements in or relating to the formation of chemical conversion coating upon metal surfaces Expired GB963128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US184959A US3129121A (en) 1962-04-04 1962-04-04 Phosphate coating solution and method of coating ferriferous metal

Publications (1)

Publication Number Publication Date
GB963128A true GB963128A (en) 1964-07-08

Family

ID=22678999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11328/63A Expired GB963128A (en) 1962-04-04 1963-03-21 Improvements in or relating to the formation of chemical conversion coating upon metal surfaces

Country Status (4)

Country Link
US (1) US3129121A (en)
DE (1) DE1269452B (en)
FR (1) FR1352568A (en)
GB (1) GB963128A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2418118A1 (en) * 1974-04-13 1975-10-23 Collardin Gmbh Gerhard Phosphate spray coating for iron and steel - from aq acid soln of alkali- and/or ammonium-orthophosphate and accelerator
DE2505172A1 (en) * 1975-02-07 1976-09-16 Collardin Gmbh Gerhard Phosphate coating of iron and steel sheet - by two step process improving bath life

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432270A (en) * 1966-07-25 1969-03-11 Amchem Prod Method for determining nitrite concentration in acidic accelerated phosphating solutions
US5073196A (en) * 1989-05-18 1991-12-17 Henkel Corporation Non-accelerated iron phosphating
IT1397902B1 (en) * 2010-01-26 2013-02-04 Np Coil Dexter Ind Srl PRETREATMENT PROCESSES FOR PAINTING, LOW ENVIRONMENTAL IMPACT, ALTERNATIVE TO TRADITIONAL PHOSPHATE TREATMENTS.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1936533A (en) * 1931-09-08 1933-11-21 Du Pont Phosphates of alkylolamine compounds and their production
US2298280A (en) * 1939-02-02 1942-10-13 Parker Rust Proof Co Treatment of metal
US2333206A (en) * 1939-05-13 1943-11-02 Du Pont Protection of ferrous metals against corrosion
US2328540A (en) * 1940-06-08 1943-09-07 Monsanto Chemicals Method of and material for treating metal
US2318606A (en) * 1941-07-31 1943-05-11 Du Pont Corrosion inhibition
US2574955A (en) * 1948-07-14 1951-11-13 Tide Water Associated Oil Comp Esterified alkylolamine salts of acid esters of phosphorus acids
NL106717C (en) * 1953-06-08
US2835618A (en) * 1954-03-09 1958-05-20 Parker Rust Proof Co Solution and method for producing heat resistant electrical insulation coatings on ferrous surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2418118A1 (en) * 1974-04-13 1975-10-23 Collardin Gmbh Gerhard Phosphate spray coating for iron and steel - from aq acid soln of alkali- and/or ammonium-orthophosphate and accelerator
DE2505172A1 (en) * 1975-02-07 1976-09-16 Collardin Gmbh Gerhard Phosphate coating of iron and steel sheet - by two step process improving bath life

Also Published As

Publication number Publication date
FR1352568A (en) 1964-02-14
DE1269452B (en) 1968-05-30
US3129121A (en) 1964-04-14

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