Nickel-Zinc Master Alloy

The Nickel Zinc (NiZn) galvanizing process is a solution to the problem that occurs during the hot dip galvanizing process of silicon-containing steels. These reactive steels exhibit a higher rate of alloy growth ("Sandelin effect") during the galvanizing process, leading to thicker coats, poor adhesion and a poor surface appearance.
The Nickel in the NiZn alloy helps suppress this reactive coating tendency in these types of steels with up to 0.20% Silicon. Nickel contents in NiZn galvanizing baths can range from 0.05 to 0.14%, but typically on the lower end of this range due to issues with excessive dross and rough surface when casting with higher nickel baths.
Figure showing the nickel effect on coating thickness in galvanizing alloys.
Eastern Alloys manufactures a NiZn master alloy (approximately 0.5% Ni) that used in the alloying process for the NiZn galvanizing bath. The advantage of using the NiZn master alloy is a faster and easier alloying process, by cutting on the various melting, handling and inventory issues that tend to occur when adding Nickel directly. Please contact us to discuss the cost savings advantages of using our NiZn master alloy for the Hot Dip Galvanizing process.