GB625834A - Improvements in or relating to surface finishing aluminium and its alloys - Google Patents

Improvements in or relating to surface finishing aluminium and its alloys

Info

Publication number
GB625834A
GB625834A GB2760646A GB2760646A GB625834A GB 625834 A GB625834 A GB 625834A GB 2760646 A GB2760646 A GB 2760646A GB 2760646 A GB2760646 A GB 2760646A GB 625834 A GB625834 A GB 625834A
Authority
GB
United Kingdom
Prior art keywords
bath
acid
specific gravity
alloys
phosphoric acid
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
GB2760646A
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.)
ERIC SHELTON JONES
UNITED ANODISING Ltd
Original Assignee
ERIC SHELTON JONES
UNITED ANODISING 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 ERIC SHELTON JONES, UNITED ANODISING Ltd filed Critical ERIC SHELTON JONES
Priority to GB2760646A priority Critical patent/GB625834A/en
Publication of GB625834A publication Critical patent/GB625834A/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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C23F3/03—Light metals with acidic solutions

Abstract

A process of brightening aluminium or alloys thereof consists in immersion for a suitable period in a bath containing phosphoric acid of specific gravity 1.72 with or without a quantity of added water not exceeding 20 per cent by volume of the diluted bath at a temperature adequate to ensure brightening of the surface of the articles being treated. In the bath, sulphuric acid may be included in a proportion not exceeding two parts of sulphuric acid (specific gravity 1.84) to one part of phosphoric acid (specific gravity 1.72). A small proportion of a compound of a metal electronegative to lead may be present in the bath, which metal may be antimony, e.g. in the form of antimony trioxide. After removal from the bath the articles may be allowed to drain so that they are further brightened by the liquid on the surface, and then rinsed in hot water, or in a hot solution containing sulphuric acid and chromic acid, or phosphoric acid and chromic acid, or they may be so rinsed without being allowed to drain.
GB2760646A 1946-09-13 1946-09-13 Improvements in or relating to surface finishing aluminium and its alloys Expired GB625834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2760646A GB625834A (en) 1946-09-13 1946-09-13 Improvements in or relating to surface finishing aluminium and its alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2760646A GB625834A (en) 1946-09-13 1946-09-13 Improvements in or relating to surface finishing aluminium and its alloys

Publications (1)

Publication Number Publication Date
GB625834A true GB625834A (en) 1949-07-05

Family

ID=10262355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2760646A Expired GB625834A (en) 1946-09-13 1946-09-13 Improvements in or relating to surface finishing aluminium and its alloys

Country Status (1)

Country Link
GB (1) GB625834A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977220C (en) * 1950-04-27 1965-06-24 Eugen Schellenbach Process for the production of high-gloss reflectors from pure or ultra-pure aluminum and its magnesium alloys
US3663327A (en) * 1969-08-13 1972-05-16 Chemed Corp Formulation and method for brightening aluminum
US4714528A (en) * 1985-07-26 1987-12-22 Fuji Photo Film Co., Ltd. Process for producing aluminum support for lithographic printing plate
US4909894A (en) * 1986-02-24 1990-03-20 Fuji Photo Film Co., Ltd. Process for producing support for lithographic printing plate
GB2271578A (en) * 1992-09-17 1994-04-20 Rieger Franz Metallveredelung Pretreatment of light metals with phosphoric acid; electroless deposition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977220C (en) * 1950-04-27 1965-06-24 Eugen Schellenbach Process for the production of high-gloss reflectors from pure or ultra-pure aluminum and its magnesium alloys
US3663327A (en) * 1969-08-13 1972-05-16 Chemed Corp Formulation and method for brightening aluminum
US4714528A (en) * 1985-07-26 1987-12-22 Fuji Photo Film Co., Ltd. Process for producing aluminum support for lithographic printing plate
US4909894A (en) * 1986-02-24 1990-03-20 Fuji Photo Film Co., Ltd. Process for producing support for lithographic printing plate
GB2271578A (en) * 1992-09-17 1994-04-20 Rieger Franz Metallveredelung Pretreatment of light metals with phosphoric acid; electroless deposition
GB2271578B (en) * 1992-09-17 1996-09-18 Rieger Franz Metallveredelung Bath for the pre-treatment of light metals,process therefor and articles produced

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