The additional material can contain in particular zinc and be applied by hot galvanizing.
More specifically, the invention provides a tri-layer anode having an improved service life when used, for example, for steel strip electrogalvanizing.
A zinc-coating pot for galvanizing steel strip has two levels along its bottom surface.
The zinc plated steel plate is preferably cooled at a speed of 5 °C/sec or more to 300 °C after plating and may be optionally subjected to an alloying treatment after plating.
A zincate zinc plating bath capable of efficiently forming a zinc plating film, which has high gloss and high quality, even at low current density.
Provided is an additive for zinc plating baths which enables speedy formation of a zinc plating film that exhibits little thickness variation among the portions of a substrate surface.
The invention provides a pretreatment process for electroplating aluminum parts or strip, in which the zincating solution is modified to improve the adhesion of the subsequent electroplate to the substrate.
The residue of the saturating mixture is collected and regenerated for use in subsequent zinc-plating cycles.
The invention relates to the field of thermochemical processing of articles made from aluminium alloys by thermodiffusion galvanization.
The present invention relates to a hot-dip coating alloy composition suitable for galvannealing steel sheet.
This is particularly advantageous for use in coating lines where galvanised and the galvannealed products are manufacturing alternatively.
Galvannealing dual phase steels, which should be processed at relatively low temperatures, is therefor greatly facilitated.
The strip may be galvanized or galvannealed at a temperature within thirty degrees F of the temperature of the bath.
Zinc plated on to polished iron (5) adheres and covers well, is ductile and is suitable for the direct application of a paint coating.
The etchant or zincating bath may also be used alone in other plating processes requiring these type substrate treatments.
Dross particles remain suspended and do not accumulate on the bottom of the zinc-coating pot in this region.
The method suggested for controlling a galvannealing process consists in determining the iron content in the ZnFe layer of a steel band.
The heating power (Pact) for the galvannealing oven is set depending on the iron content.
An additive for zinc plating baths which contains a water-soluble copolymer which comprises two kinds of amine compounds as constituent units.