GB606382A - Improvements relating to the surface protection of metals - Google Patents

Improvements relating to the surface protection of metals

Info

Publication number
GB606382A
GB606382A GB122846A GB122846A GB606382A GB 606382 A GB606382 A GB 606382A GB 122846 A GB122846 A GB 122846A GB 122846 A GB122846 A GB 122846A GB 606382 A GB606382 A GB 606382A
Authority
GB
United Kingdom
Prior art keywords
bath
value
conductivity
metals
physical constants
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
GB122846A
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.)
WILLIAM IVAN WALTERS
Walterisation Co Ltd
Original Assignee
WILLIAM IVAN WALTERS
Walterisation Co 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 WILLIAM IVAN WALTERS, Walterisation Co Ltd filed Critical WILLIAM IVAN WALTERS
Priority to GB122846A priority Critical patent/GB606382A/en
Publication of GB606382A publication Critical patent/GB606382A/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
    • C23C22/86—Regeneration of coating baths

Abstract

In a process for the production of corrosion resistant coatings on a metal surface, the surface is immersed in a bath of treating solution, automatic indicating means, responsive to one or more physical constants of the solution, indicating changes in the composition of the bath. The physical constants may be pH value, conductivity or colour and the indicator may operate electric controls to add reagents and maintain the concentration of the bath at the desired value. Oxalate or phosphate baths may be used having a conductivity of 520-540 mhos./cm. x 104 or a pH value of 1.8-2.5 respectively. The indication is stated to achieve a high degree of accuracy particularly when the sludge formed is removed by a continuous filtration process as described in Specification 606,381.
GB122846A 1946-01-14 1946-01-14 Improvements relating to the surface protection of metals Expired GB606382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB122846A GB606382A (en) 1946-01-14 1946-01-14 Improvements relating to the surface protection of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB122846A GB606382A (en) 1946-01-14 1946-01-14 Improvements relating to the surface protection of metals

Publications (1)

Publication Number Publication Date
GB606382A true GB606382A (en) 1948-08-12

Family

ID=9718347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB122846A Expired GB606382A (en) 1946-01-14 1946-01-14 Improvements relating to the surface protection of metals

Country Status (1)

Country Link
GB (1) GB606382A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401065A (en) * 1964-08-18 1968-09-10 Amchem Prod Automatic control of nitrite addition in acid phosphate coating solutions
US4089710A (en) * 1975-04-23 1978-05-16 Imperial Chemical Industries Limited Phosphating method with control in response to conductivity change

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401065A (en) * 1964-08-18 1968-09-10 Amchem Prod Automatic control of nitrite addition in acid phosphate coating solutions
US4089710A (en) * 1975-04-23 1978-05-16 Imperial Chemical Industries Limited Phosphating method with control in response to conductivity change

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