NL7701824A - Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint - Google Patents

Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint

Info

Publication number
NL7701824A
NL7701824A NL7701824A NL7701824A NL7701824A NL 7701824 A NL7701824 A NL 7701824A NL 7701824 A NL7701824 A NL 7701824A NL 7701824 A NL7701824 A NL 7701824A NL 7701824 A NL7701824 A NL 7701824A
Authority
NL
Netherlands
Prior art keywords
alloy
paint
aluminium
corrosion
protective coating
Prior art date
Application number
NL7701824A
Other languages
Dutch (nl)
Original Assignee
Metallgesellschaft Ag
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 Metallgesellschaft Ag filed Critical Metallgesellschaft Ag
Priority to NL7701824A priority Critical patent/NL7701824A/en
Publication of NL7701824A publication Critical patent/NL7701824A/en

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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/66—Treatment of aluminium or alloys based thereon

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The process comprises treating the surface of Al (alloy) with an alkaline soln. having pH >10 and contg. Ti ion and complexing agent, washing with water, and then treating with an acidic soln. contg. tannine or tannic acid as the main component. In an example Al alloy plate was spray with an alkaline soln. contg. NaOH of 7 g/l, 40% Ti sulphate soln of 1 g/l and Na gluconate of 1-8 g/l at 65/C for 6 sec. washed with water, spray with an acidic soln. contg. tannic acid of 50 g l at 55 degrees C ofr l sec. washed with water, and then dried.
NL7701824A 1977-02-21 1977-02-21 Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint NL7701824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7701824A NL7701824A (en) 1977-02-21 1977-02-21 Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7701824A NL7701824A (en) 1977-02-21 1977-02-21 Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint

Publications (1)

Publication Number Publication Date
NL7701824A true NL7701824A (en) 1978-08-23

Family

ID=19828022

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7701824A NL7701824A (en) 1977-02-21 1977-02-21 Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint

Country Status (1)

Country Link
NL (1) NL7701824A (en)

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
BV The patent application has lapsed