JPS6452091A - Degreased al alloy sheet for coating - Google Patents

Degreased al alloy sheet for coating

Info

Publication number
JPS6452091A
JPS6452091A JP20798787A JP20798787A JPS6452091A JP S6452091 A JPS6452091 A JP S6452091A JP 20798787 A JP20798787 A JP 20798787A JP 20798787 A JP20798787 A JP 20798787A JP S6452091 A JPS6452091 A JP S6452091A
Authority
JP
Japan
Prior art keywords
alloy sheet
degreased
coating
sodium
silicate
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.)
Granted
Application number
JP20798787A
Other languages
Japanese (ja)
Other versions
JPH0559998B2 (en
Inventor
Masaji Saito
Toshiaki Kobayashi
Masaaki Yokochiyou
Yoshitaka Hiromae
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.)
Sky Aluminium Co Ltd
Original Assignee
Sky Aluminium 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 Sky Aluminium Co Ltd filed Critical Sky Aluminium Co Ltd
Priority to JP20798787A priority Critical patent/JPS6452091A/en
Publication of JPS6452091A publication Critical patent/JPS6452091A/en
Publication of JPH0559998B2 publication Critical patent/JPH0559998B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:To obtain the title degreased Al alloy sheet for coating capable of exhibiting excellent filiform corrosion resistance after coating by controlling the amt. of a silicate remaining on the surface of an alkali-degreased Al alloy sheet for coating to lower than a specified value. CONSTITUTION:An Al alloy sheet for coating is degreased with an alkaline processing soln. not substantially contg. a silicate. A processing soln. contg. about 1-3% of >=1 kind among sodium phosphate, sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, sodium sulfate, and sodium sesquisulfate is preferably used as the processing soln., and the pH is preferably controlled to >=8. By this method, the amt. of the silicate remaining on the surface of the treated Al alloy sheet can be reduced to <=50mg/m<2>, expressed in terms of SiO2. Chemical conversion treatment and electrodeposition are applied to the degreased Al alloy sheet, and a coated sheet having excellent filiform corrosion resistance is obtained.
JP20798787A 1987-08-21 1987-08-21 Degreased al alloy sheet for coating Granted JPS6452091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20798787A JPS6452091A (en) 1987-08-21 1987-08-21 Degreased al alloy sheet for coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20798787A JPS6452091A (en) 1987-08-21 1987-08-21 Degreased al alloy sheet for coating

Publications (2)

Publication Number Publication Date
JPS6452091A true JPS6452091A (en) 1989-02-28
JPH0559998B2 JPH0559998B2 (en) 1993-09-01

Family

ID=16548806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20798787A Granted JPS6452091A (en) 1987-08-21 1987-08-21 Degreased al alloy sheet for coating

Country Status (1)

Country Link
JP (1) JPS6452091A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0533158A (en) * 1991-10-21 1993-02-09 Nippon Steel Corp Aluminum sheet excellent in filiform corrosion resistance
CN104372366A (en) * 2014-09-30 2015-02-25 苏州长盛机电有限公司 Multifunctional metal surface treatment agent and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0533158A (en) * 1991-10-21 1993-02-09 Nippon Steel Corp Aluminum sheet excellent in filiform corrosion resistance
CN104372366A (en) * 2014-09-30 2015-02-25 苏州长盛机电有限公司 Multifunctional metal surface treatment agent and preparation method thereof

Also Published As

Publication number Publication date
JPH0559998B2 (en) 1993-09-01

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