Zinc galvanizing method for a single surface of a metal tube

Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...

Reexamination Certificate

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C148S533000

Reexamination Certificate

active

11165379

ABSTRACT:
A zinc galvanizing method for a single surface of a metal tube includes a first step of preparing metal tubes, a second step of galvanizing the metal tubes, a third step of acid washing, a fourth step of washing the metal tubes with water, and a final fifth step of drying the metal tubes. Then only an inner surface or an outer surface of meal tube is galvanized for resisting corrosion. The metal tubes according to the invention can save the subsequent expenditure required for maintenance and treating rust, and possible to prolong their service life, and the method can be applied to steel tubes of any shape or size.

REFERENCES:
patent: RE24852 (1960-08-01), Armstrong et al.
patent: 4101345 (1978-07-01), Hunter et al.
patent: 4120997 (1978-10-01), Franks et al.
patent: 4487672 (1984-12-01), Vrable
patent: 5849382 (1998-12-01), Schneck
patent: 2004/0214029 (2004-10-01), Carey et al.
patent: 52129636 (1977-10-01), None
patent: 0428479 (1992-01-01), None

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