ZINCO ZP 5300 - Nickel Zinc Phosphate

Zinc coatings are widely used for corrosion protection of steel parts. 
Under some conditions, the corrosion resistance exhibited by pure zinc coatings is insufficient.
Alloying zinc with more noble metals reduces the dissolution rate of the coating. 
Zinc alloyed with elements such as cobalt, nickel and iron is more resistant to corrosion than its pure form. 
higher corrosion resistance.
Among all zinc alloy coatings, zinc-nickel coatings are the most popular. 
This is because it exhibits higher corrosion resistance and thermal stability than others.
Thanks to their superior properties, zinc-nickel coatings are frequently used in the automotive, aerospace and defense industries.
Zinc-nickel alloys have the highest corrosion resistance of electroplated zinc coatings.
These alloys contain nickel in the range of 5-15%. Above this ratio, they become more noble than steel and
loses its sacrificial protective properties.
The corrosion resistance of zinc-nickel alloys has the potential for the red rust phenomenon to occur for 1000 hours or more in the neutral salt test.
Research on zinc-nickel coatings has shown that coatings containing between 10-15% nickel
exhibit optimum corrosion resistance, weldability and ductility properties
has been demonstrated. 
In electrolytic coatings, weldability increases with decreasing coating thickness.
Zinc-nickel coatings exhibit equivalent or even higher corrosion resistance at much thinner thicknesses than pure zinc coatings,
Accordingly, the weldability capability also increases. 
This makes zinc-nickel coatings preferable for applications requiring welding.
Another advantage of zinc-nickel alloys is that they retain 60% to 80% of their corrosion resistance after forming and heat treatment of the coated components.
This makes them suitable for automotive applications such as fasteners, brake and fuel lines and other under-hood components.
Alkaline formulations of zinc-nickel coatings are preferred because of their ease of handling and because they provide more uniform alloy composition and better overall corrosion resistance, especially in pipes and internal configurations of parts.