GB1145881A - Improvements in or relating to chemical polishing of aluminum and aluminum alloys - Google Patents

Improvements in or relating to chemical polishing of aluminum and aluminum alloys

Info

Publication number
GB1145881A
GB1145881A GB15205/66A GB1520566A GB1145881A GB 1145881 A GB1145881 A GB 1145881A GB 15205/66 A GB15205/66 A GB 15205/66A GB 1520566 A GB1520566 A GB 1520566A GB 1145881 A GB1145881 A GB 1145881A
Authority
GB
United Kingdom
Prior art keywords
acid
weight
bath
aluminum
phosphoric
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
GB15205/66A
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.)
CHARLES CALVIN CONN
SAMUEL LENARD CONN
Original Assignee
CHARLES CALVIN CONN
SAMUEL LENARD CONN
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 CHARLES CALVIN CONN, SAMUEL LENARD CONN filed Critical CHARLES CALVIN CONN
Publication of GB1145881A publication Critical patent/GB1145881A/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

1,145,881. Etching. C. C. COHN, and S: L. COHN, [trading as COLONIAL ALLOYS CO.]: 5 April, 1966 [28 June, 1965], No, 15205/66. Heading B6J. [Also in Division C7] An Al surface is brightened by treatment, suitably at 210‹ to 220‹ F., in a bath comprising, by weight, 40À0 to 64À6% phosphoric acid, 9À97 to 25À0% sulphuric acid, 1À5 to 4À0% nitric acid, 1À45 to 3À1% Al, 13-2 to 21À5% water and 0À0116 to 0À126% Cu, the ratio of phosphoric to sulphuric acid being 1À57:1 to 6À5:1, the total acids making up 50À0 to 89À6% of the mixture by weight and the specific gravity of the bath at 25‹ C. being 1À72 to 1À77. Preferably the bath comprises 42À5 to 48À0% phosphoric acid, 21À0 to 25À0% sulphuric acid, 3À0 to 3À6% nitric acid, 15À6 to 19À0% water, 1À6 to 2À7% Al and 0À0116 to 0À0126% Cu, the ratio of phosphoric to sulphuric acid being 1À57:1 to 2À07 :1, the total acids making up 63À4 to 73À0% of the mixture by weight and the specific gravity of the bath at 25‹ C. being 1À74 to 1À75. 1À0 to 1À5% by weight of ammonia salts may also be present: The bath may be replenished with a solution comprising by weight 35À2 to 46À40% phosphoric acid, 7À13 to 18À69% sulphuric acid, 12À01 to 13À193% nitric acid, 0À005 to 0À0053% Cu, 0À208 to 0À460% ammonia and 31À72 to 32À840% of water, with a specific gravity at 25‹ C. of 1À495 to 1À515.
GB15205/66A 1965-06-28 1966-04-05 Improvements in or relating to chemical polishing of aluminum and aluminum alloys Expired GB1145881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46769865A 1965-06-28 1965-06-28

Publications (1)

Publication Number Publication Date
GB1145881A true GB1145881A (en) 1969-03-19

Family

ID=23856757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15205/66A Expired GB1145881A (en) 1965-06-28 1966-04-05 Improvements in or relating to chemical polishing of aluminum and aluminum alloys

Country Status (3)

Country Link
US (1) US3425881A (en)
DE (1) DE1521709A1 (en)
GB (1) GB1145881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1040265B (en) * 1975-08-07 1979-12-20 Rolls Royce 1971 Ltd Removal of aluminium diffusion coating from substrates - by means of a strong acid solution
GB1565349A (en) * 1975-10-20 1980-04-16 Albright & Wilson Aluminium polishing compositions
US4283248A (en) * 1979-02-01 1981-08-11 Nitto Electric Industrial Co., Ltd. Etching solution for tin-nickel alloy and process for etching the same
US4614607A (en) * 1984-09-26 1986-09-30 The Boeing Company Non-chromated deoxidizer
US5279707A (en) * 1992-10-23 1994-01-18 Time Savers Die discoloration remover solution and method
FR3110604B1 (en) 2020-05-20 2022-06-10 Institut De Recherche Tech Materiaux Metallurgie Procedes Chemical polishing bath for aluminum and aluminum alloys, and method using such a bath

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202612A (en) * 1960-12-05 1965-08-24 Monsanto Co Composition for bright polishing aluminum
US3119726A (en) * 1962-10-22 1964-01-28 Virginia Carolina Chem Corp Process and composition for brightening aluminum
US3301787A (en) * 1965-05-24 1967-01-31 Samuel L Cohn Chemical brightening of aluminum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition

Also Published As

Publication number Publication date
US3425881A (en) 1969-02-04
DE1521709A1 (en) 1969-09-18

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