C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/37
C25D 3/22 (2006.01)
Patent
CA 1285520
ABSTRACT OF THE DISCLOSURE: Disclosed is an electrolytic galvanizing process which, due to its very specific conditions of operation, permits one to obtain a highly compact deposit, with good corrosion resistance and surface appearance. The process is based on the discovery that there exists a precise relationship between the current density and the fluid dynamics conditions of the electrolyte and comprises the steps of continuously passing the body to be coated with zinc through an acid electrolytic solution containing zinc ions in a cell, passing electrolytic solution through the space defined between an anode and said body serving as a cathode, and adjusting the plating current density, the fluid dynamic conditions of the electrolytic solution or both of said density and fluid dynamic conditions so as to substantially satisfy the relationship defined by the formula I = K C Ren where I is the current density in A/dm2' C is the zinc concentration in g/l, Re is the Reynolds number characteristic of the electrolytic solution flow, and K and n are empirical variables depending essentially on the geometry of the cell, wherein K is in the range from 10-2 to 10-6, and n is in the range from 0.5 to 1.
514038
Alota Santa
Azzerri Nazzareno
Bruno Roberto
Memmi Massimo
Ramundo Susanna
Alota Santa
Azzerri Nazzareno
Bruno Roberto
Centro Sperimentale Metallurgico S.p.a.
Centro Sviluppo Materiali S.p.a.
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