The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1999
Filed:
May. 13, 1998
John A Sinsel, Weirton, WV (US);
Lowell W Austin, Weirton, WV (US);
Weirton Steel Corporation, Weirton, WV (US);
Abstract
A new combination of steel strip electrolytic plating process steps which eliminate iron ion dissolution from continuous-strip steel substrate into chemically-corrosive plating solutions, such as Halogen-bath or methylsulphonic acid plating solutions, of horizontal passline electrolytic tin plating means which plate a single strip surface at a time. The previous use of a cyanide in Halogen-bath tin plating operations which formed a hazardous precipitant (prussian blue) is eliminated by eliminating iron ion dissolution from the steel strip substrate. And conversion of stannous ions to stannic ions, which formed additional Halogen-bath precipitant, is substantially eliminated. Also, new electrolytic plated product, with improved corrosion-prevention characteristics, is provided in which a flat-rolled steel substrate strike-coat of tin and/or nickel is plated simultaneously with electrolytic pickling of such cleansed substrate; pickle-plating is carried out prior to finish-surface electrolytic tin plating in such a horizontal passline electrolytic tin plating means.