GB1383285A - Phosphate coatings on iron and steel - Google Patents

Phosphate coatings on iron and steel

Info

Publication number
GB1383285A
GB1383285A GB3823073A GB3823073A GB1383285A GB 1383285 A GB1383285 A GB 1383285A GB 3823073 A GB3823073 A GB 3823073A GB 3823073 A GB3823073 A GB 3823073A GB 1383285 A GB1383285 A GB 1383285A
Authority
GB
United Kingdom
Prior art keywords
total
steel
iron
acid
free
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
GB3823073A
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.)
Pyrene Chemical Services Ltd
Original Assignee
Pyrene Chemical Services Ltd
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 Pyrene Chemical Services Ltd filed Critical Pyrene Chemical Services Ltd
Publication of GB1383285A publication Critical patent/GB1383285A/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
    • C23C22/12—Orthophosphates containing zinc cations
    • C23C22/13—Orthophosphates containing zinc cations containing also nitrate or nitrite anions

Abstract

1383285 Phosphate coating iron and steel PYRENE CHEMICAL SERVICES Ltd 13 Aug 1973 [16 Aug 1972] 38230/73 Heading C7U In the phosphating of iron and steel by immersion in an acid nitrate-accelerated zinc phosphate solution at 80-98‹C, the bath solution is replennished with an aqueous acid concentrate in which the wt. ratio NO 3 : P 2 O 5 is 0.6-1.5, the wt. ratio free P 2 O 5 : total P 2 O 5 is 0.45-0.75 and the total wt. concentration P 2 O 5 + Zn + NO 3 is more than 47%, and the total acid point number is maintained at 20-100 and the free P 2 O 5 : total P 2 O 5 ratio at 0.35-0.6 in the phosphating bath. The initial concentrate for the bath may comprise, by weight; NO 3 : P 2 O 5 = 0.5-2.0, free P 2 O 5 : total P 2 O 5 = 0.4-0.75 and P 2 O 5 + Zn + NO 3 > 47%. The zinc may be added as the metal, ZnO, ZnCO 3 , Zn(NO 3 ) 2 or Zn 3 (PO 4 ) 2 ; the P 2 O 5 may be derived from H 3 PO 4 or Zn 3 (PO 4 ) 2 and the NO 3 may be added as HNO 3 or Zn(NO 3 ) 2 . Other additives are Fe<SP>2+</SP>, urea, Cu, Ni, Na, NH 4 , Ca, F, SO 4 and Cl. The steel may be alkali cleaned, acid pickled and rinsed before phosphating.
GB3823073A 1972-08-16 1973-08-13 Phosphate coatings on iron and steel Expired GB1383285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722240049 DE2240049B2 (en) 1972-08-16 1972-08-16 PROCESS FOR THE PRODUCTION OF PHOSPHATE COATINGS ON IRON AND STEEL AND CONCENTRATES FOR THE PRODUCTION AND ADDITION OF THE PHOSPHATIZING SOLUTION USED IN THIS SITE

Publications (1)

Publication Number Publication Date
GB1383285A true GB1383285A (en) 1974-02-12

Family

ID=5853587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3823073A Expired GB1383285A (en) 1972-08-16 1973-08-13 Phosphate coatings on iron and steel

Country Status (10)

Country Link
AT (1) AT321054B (en)
BE (1) BE799692A (en)
BR (1) BR7305895D0 (en)
DE (1) DE2240049B2 (en)
ES (1) ES417921A1 (en)
FR (1) FR2196397B1 (en)
GB (1) GB1383285A (en)
IT (1) IT992935B (en)
NL (1) NL171600C (en)
SE (1) SE387666B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204067A (en) * 1987-04-11 1988-11-02 Ardrox Pyrene Ltd A process for phosphating steel or galvanized steel prior to electro-immersion painting

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939014A (en) * 1974-11-20 1976-02-17 Amchem Products, Inc. Aqueous zinc phosphating solution and method of rapid coating of steel for deforming
DE2540685C2 (en) * 1975-09-12 1985-06-27 Metallgesellschaft Ag, 6000 Frankfurt Process for the production of phosphate coatings

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2048665A1 (en) * 1970-10-03 1972-04-06 Metallgesellschaft Ag Phosphating of steel using a preliminary coat using concentrated solu

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204067A (en) * 1987-04-11 1988-11-02 Ardrox Pyrene Ltd A process for phosphating steel or galvanized steel prior to electro-immersion painting
GB2204067B (en) * 1987-04-11 1991-11-27 Ardrox Pyrene Ltd A process for phosphating prior to electro-immersion painting

Also Published As

Publication number Publication date
BR7305895D0 (en) 1974-05-16
AT321054B (en) 1975-03-10
IT992935B (en) 1975-09-30
NL171600B (en) 1982-11-16
FR2196397A1 (en) 1974-03-15
SE387666B (en) 1976-09-13
NL7309853A (en) 1974-02-19
ES417921A1 (en) 1976-03-16
BE799692A (en) 1973-09-17
DE2240049A1 (en) 1974-02-28
DE2240049B2 (en) 1977-05-12
NL171600C (en) 1983-04-18
FR2196397B1 (en) 1975-12-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee