Joint crevice corrosion inhibitor

Details Joint crevice corrosion inhibitor Joint crevice corrosion inhibitor

1990-04-02

1991-03-05

Hepperle, Stephen M.

Heat exchange

Side-by-side tubular structures or tube sections

With manifold type header or header plate

165149, F28F 902

Patent

active

049970356

ABSTRACT:
This invention is to an improved method for reducing crevice corrosion in assembly joints of aluminum fluid handling devices, the improvement comprising, providing a series of spaced ribs at the assembly joint configured to intermittently resist engagement of components along an elongated assembly crevice sufficient to segment the crevice into a plurality of minor assembly crevices dimensioned to permit substantial mixing of fluid within the minor crevices with fluid being handled by the device. The invention has particular utility in automotive heat exchangers wherein crevices at joints where polymeric tanks are assembled to aluminum metal headers are susceptible to crevice corrsion.

REFERENCES:
patent: 4023618 (1977-05-01), Kun et al.
patent: 4289507 (1981-09-01), Cadars et al.
patent: 4546823 (1985-10-01), Melnyk
patent: 4576223 (1986-03-01), Humpolik et al.
patent: 4600051 (1986-02-01), Wehrman
patent: 4651815 (1987-03-01), Logic et al.
patent: 4917182 (1990-04-01), Beamer

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