GB1319766A - Phosphating process - Google Patents

Phosphating process

Info

Publication number
GB1319766A
GB1319766A GB1319766DA GB1319766A GB 1319766 A GB1319766 A GB 1319766A GB 1319766D A GB1319766D A GB 1319766DA GB 1319766 A GB1319766 A GB 1319766A
Authority
GB
United Kingdom
Prior art keywords
nitrite
nitrate
oct
nano
solution
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
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of GB1319766A publication Critical patent/GB1319766A/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
    • C23C22/14—Orthophosphates containing zinc cations containing also chlorate anions

Abstract

1319766 Phosphatising IMPERIAL CHEMICAL INDUSTRIES 7 Oct 1970 [23 Oct 1969] 51925/69 Headings C7U In phosphatisation of a metallic substrate by contact with an acidic zinc phosphate solution containing chlorate, there is maintained in the solution, as coating proceeds, a nitrite concentration of at least 0À003 wt% and a nitrate concentration of at least 0À5 wt% (calculated as NO 2 and NO 3 respectively) by addition of nitrite and nitrate. Preferred amounts of chlorate, nitrite and nitrate are 0À01 - 1% (as CIO 3 ), 0À003 - 0À05% and 0À5 - 2% respectively; nitrate may be added as NaNO 3 , NH 4 NO 3 , or Zn (NO 3 ) 2 and nitrite as NaNO 2 or NH 4 NO 2 . The solution may contain Ni ions when used on galvanized steel; it is applied to ferrous metal. such as steel by dipping, or preferably, spraying, at 100 - 130‹C.
GB1319766D 1969-10-23 1969-10-23 Phosphating process Expired GB1319766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5192569 1969-10-23

Publications (1)

Publication Number Publication Date
GB1319766A true GB1319766A (en) 1973-06-06

Family

ID=10461956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1319766D Expired GB1319766A (en) 1969-10-23 1969-10-23 Phosphating process

Country Status (1)

Country Link
GB (1) GB1319766A (en)

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Legal Events

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