Flux for reflowing tinplate

Details Flux for reflowing tinplate Flux for reflowing tinplate

1994-02-18

1995-06-27

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating moving substrate

205140, 205152, 205154, 205196, 205226, C25D 552

Patent

active

054276772

ABSTRACT:
An improved process for reflowing tinplate by treating a matte finish of tinplate with a flux, and reflowing the fluxed matte tinplate to produce bright tinplate, wherein the flux is a naphthalenesulfonic compound, preferably having the a naphthalene ring which is substituted with at least one --SO.sub.3 M group where M is hydrogen, an alkali metal or an alkaline earth metal and is optionally substituted with at least one hydroxy group. The flux is preferably applied to the matte tinplate in an aqueous solution which may contain an acid. The most preferred fluxes are 2-naphthol-6,8-disulfonic acid, 1-naphthol-3,6-disulfonic acid, and dipotassium 2-naphthol-6,8-disulfonate.

REFERENCES:
patent: 2633450 (1953-03-01), Andrews
patent: 3860502 (1975-01-01), Johnson
patent: 4052234 (1977-10-01), Yamagishi et al.
patent: 5174887 (1992-12-01), Federman et al.
Belousova et al. Improving the practice of fluxing and hardening strip in an electrolytic tinning line, Stal (USSR) , May 1991.
"A History of Tinplate" by Smith, Tin International, Jun. 1978.
"The Technology of Tinplate" by Hoare et al., St. Martin's Press, New York, 1965.(no month).

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