| (19) |
 |
|
(11) |
EP 0 057 334 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
08.12.1982 Bulletin 1982/49 |
| (43) |
Date of publication A2: |
|
11.08.1982 Bulletin 1982/32 |
| (22) |
Date of filing: 31.03.1981 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
29.12.1980 US 221176
|
| (71) |
Applicant: BALTIMORE AIRCOIL COMPANY, INC. |
|
() |
|
| (72) |
Inventors: |
|
- Geary, David F.
()
- Honchar, Dennis R.
()
|
|
| |
|
| (54) |
Pretreatment process for galvanized metal prior to its coating with organic powder |
(57) This invention relates to a pretreatment process for galvanized metal which, unlike
existing processes, was specifically developed for galvanized metal. Because of the
natural corrosion protection properties of the zinc cladding of galvanized metal,
no additional passivation is necessary as is required with existing processes. Also,
the invention relates to the galvanized metal which has been pretreated by the process
of this invention prior to application of an organic powder coating. Galvanized metal
treated by this pretreatment process prior to coating leads to a uniform coating which
is impervious to acid, base and salt solutions, and which will not scratch or flake
off on impact.