GB1097799A - Improvements relating to the treatment of metals - Google Patents

Improvements relating to the treatment of metals

Info

Publication number
GB1097799A
GB1097799A GB5145865A GB5145865A GB1097799A GB 1097799 A GB1097799 A GB 1097799A GB 5145865 A GB5145865 A GB 5145865A GB 5145865 A GB5145865 A GB 5145865A GB 1097799 A GB1097799 A GB 1097799A
Authority
GB
United Kingdom
Prior art keywords
acid
weight
parts
formula
choh
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
GB5145865A
Inventor
Dennis Brian Freeman
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 Co Ltd
Original Assignee
Pyrene 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 Pyrene Co Ltd filed Critical Pyrene Co Ltd
Priority to GB5145865A priority Critical patent/GB1097799A/en
Publication of GB1097799A publication Critical patent/GB1097799A/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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions
    • C23F1/36—Alkaline compositions for etching aluminium or alloys thereof

Abstract

A process for etching an aluminium surface comprises treating it with an aqueous alkali-metal hydroxide base solution containing up to 10% (based on the hydroxide) of at least one polyhydroxy compound sequestering agent in the presence of water-hardness metal salts or other etch-inhibiting metal salts which would reduce the etch rate compared with pure solutions, the solution having added thereto a sequestering agent containing at least one iminodiacetic acid group in an amount of at least 0.25 g/l. (e.g. 0.25 - 5 g/l.) to counteract the effect of the etch inhibiting salts. The polyhydroxy compound is a polyhydric alcohol of the formula CH2OH (CHOH)a CH2OH wherein a is at least 2, a starch of the formula (C6H10O5)x an acid of the formula CO2H (CHOH)b CH2OH wherein b is at least 4, gum arabic, an acid of the formula CO2H (CHOH)c CO2H wherein c is at least 3 or an alkali metal salt of one of these acids. The iminodiacetic containing compound may be ethylene diamine tetra acetic acid, nitrilo triacetic acid or diethylene triamine pentacetic acid. The solution may be obtained by diluting a concentrate containing .NaOH.300 - 400 parts by weight .iminodiacetic acid. .compound.5 - 20 parts by weight .polyhydroxy com-. .pound.5 - 20 parts by weight the balance being water to 1,000 parts by weight
GB5145865A 1965-12-03 1965-12-03 Improvements relating to the treatment of metals Expired GB1097799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5145865A GB1097799A (en) 1965-12-03 1965-12-03 Improvements relating to the treatment of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5145865A GB1097799A (en) 1965-12-03 1965-12-03 Improvements relating to the treatment of metals

Publications (1)

Publication Number Publication Date
GB1097799A true GB1097799A (en) 1968-01-03

Family

ID=10460107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5145865A Expired GB1097799A (en) 1965-12-03 1965-12-03 Improvements relating to the treatment of metals

Country Status (1)

Country Link
GB (1) GB1097799A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133044A (en) * 1983-01-10 1984-07-18 Pennwalt Corp Cleaning and etching process for aluminum containers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133044A (en) * 1983-01-10 1984-07-18 Pennwalt Corp Cleaning and etching process for aluminum containers
US4477290A (en) * 1983-01-10 1984-10-16 Pennwalt Corporation Cleaning and etching process for aluminum containers

Similar Documents

Publication Publication Date Title
US2650875A (en) Method of etching aluminum and aluminum base alloys
EP0280223A3 (en) Polyacetals, process for their fabrication from dialdehydes and polyolacids, and use of polyacetals
KR950701680A (en) Injectable alkaline cleaning concentrate (PUMPABLE ALKALINE CLEANING CONCENTRATES)
GB1027548A (en) Novel solutions and processes for the coating of metal surfaces
GB1160945A (en) Treatment of the Surfaces of Aluminium and its Alloys
GB1097799A (en) Improvements relating to the treatment of metals
GB1223206A (en) Improvements in the treatment of metal surfaces
ES431544A1 (en) Method for descaling ferrous metals
US3039970A (en) Method for inhibiting corrosion of ferrous metals
JPS54151598A (en) Manufacture of plate iron oxide
GB1247980A (en) Copper alloy cleaning process
US2839370A (en) Aluminum etching
GB662299A (en) A process for the purification of rhodium
GB985001A (en) Tinning of aluminium
GB934292A (en) Process for the preparation of heterocyclic compounds
US3594197A (en) Process and composition for immersion plating of aluminum or aluminum alloys with tin
GB976549A (en) Aluminum cleaning composition
US2853372A (en) Composition and process for the controlled etching of aluminum and aluminum alloys
KR940003980A (en) Process for preparing phenol-formaldehyde resin
GB1040843A (en) Resolution of racemic compounds
GB1346812A (en) Photographic processing composition
JPS5528954A (en) Stabilization of alkaline aqueous solution of dioxythiourea
US1736934A (en) Preparation of pickling baths
GB529382A (en) Manufacture of derivatives of aliphatic amino-sulphonic acids
JPS602387B2 (en) Aqueous solution for electroless gold plating and electroless gold plating method