Method for making corrosion resistance heat exchangers
US4852791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1988 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Jun 2, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing corrosion resistance heat exchangers having a plurality of aluminum tubular elements and fin members, the method comprising immersing the tubular elements in a bath with passing an electric current so that the surfaces thereof are covered with zinc layers of 0.3 .mu.m or more in thickness; combining the zinc plated tubular elements with fin members covered with a brazing sheet so that a core is provisionally formed; painting the provisional core with a non-corrosive flux; and placing the provisional core in a furnace to braze the fin members to the tubular elements, and also to enable the zinc layers to diffuse over the surfaces of the tubular elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.