Alkaline zinc electrolyte with optimum coating thickness distribution.
Zinc-nickel alkaline ensures a uniform coating thickness distribution on the surface over a wide current density range and is free of cyanides. Especially for less complex shaped workpieces, which are deformed after coating with zinc electrolyte, a uniform coating thickness throughout is indispensable. Alkaline zinc electrolyte is characterised by better ductility than acidic electroplated zinc-nickel and, as a basic zinc electrolyte, offers the same high corrosion protection as acidic zinc electrolyte. The very good spreading produces a uniform layer structure even on profiled workpieces, which effectively prevents the coating from flaking off. Alkaline zinc electrolyte was developed for the coating process electrogalvanising by means of bath electroplating and pin electroplating / tampon electroplating.
Application range of zinc nickel electrolyte
Zinc nickel alkaline is always used when a shiny deposit and a uniformly thick layer are required. The nickel content of approx. 14% increases the corrosion resistance of workpieces treated with zinc-nickel alkaline fivefold and offers the highest cathodic corrosion protection. This is an argument in favour of zinc-nickel alkaline, especially in corrosion protection. The further treatment of the workpieces after galvanising with zinc-nickel electrolyte is the same as for coating with conventional zinc electrolyte. Another special feature is that the nickel content of approx. 14% remains almost constant over a wide current density range.
Basic zinc electrolyte is suitable for the following metals:
-stainless steel - must be activated with nickel-strike beforehand.
-Aluminium - pre-treatment with aluminium activator required.
Chrome and titanium are unsuitable for the zinc electroplating process.
Application instructions for galvanic zinc-nickel
All metals mentioned can be treated with galvanic zinc-nickel, whereby stainless steel and aluminium require an appropriate pre-treatment. As a basic zinc electrolyte, zinc-nickel alkaline is used both in bath electroplating and in pin electroplating / pad electroplating. In all processes, they achieve excellent results in the form of a uniformly strong and shiny layer thickness, which also remains stable when the workpiece is further processed by deformation.
Alkaline zinc electrolyte is processed at room temperature; however, it can also be heated slightly. The temperature range in which alkaline zinc electrolyte can be used for coating is between 15 - 60°C.
The zinc-nickel electrolyte can be further coated or chromated like any other zinc electrolyte.
Parameters for the use of zinc-nickel electrolyte:
Bath electroplating: Graphite or nickel anodes
Pin electroplating / pad electroplating: Graphite or nickel anodes, alternatively stainless steel anodes
Anode on positive pole - workpiece on negative pole
Before treatment, please thoroughly remove rust, oil and grease from the workpiece. Wear disposable gloves when handling to prevent contamination with skin grease.
Use appropriate protective equipment such as safety goggles and gloves when working with zinc electrolyte. Use only in well-ventilated rooms!
Do you have questions about zinc electrolyte or another product for electrogalvanising from our range? Call us or contact us by e-mail. Our experts will be happy to advise you.
Identification of the mixture:
Zinc nickel electrolyte bright
(contains sodium hydroxide, diethylene triamine, nickel(II) sulphate, nickel(II) amidosulphate)
Signal word: Danger
H290: May be corrosive to metals.
H314: Causes severe skin burns and eye damage.
H317: May cause an allergic skin reaction.
H412: Harmful to aquatic life with long lasting effects.
P234: Keep only in original container.
P260: Do not breathe aerosol.
P280: Wear protective gloves / clothing / eye protection.
P301 + P330 + P331: IN case of ingestion: Rinse out mouth. Do NOT induce vomiting.
P303 + P361 + P353: IF ON SKIN (or hair): Remove all contaminated clothing immediately. Wash skin with water/shower.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if possible. Continue rinsing.
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P501: Dispose of contents/container to special waste.