What Is Nickel Sulfamate?
Nickel sulfamate, an odorless blue or green solid, serves as an ionic compound of sulfamic acid and nickel. With the formula Ni(SO2NH2)2, a molecular weight of 250.85, and CAS No. 13770-89-3, it is utilized in sulfamic acid baths for metal surface treatments.
Uses of Nickel Sulfamate
This compound is pivotal in nickel plating for its corrosion resistance, employed in various methods including matte nickel plating via sulfamic acid baths. These baths, differing from the common Watts baths, are utilized for corrosion resistance, decoration, and electroforming. Electroforming is crucial for precision machinery and aerospace components, offering high-accuracy metal replication.
Properties of Nickel Sulfamate
With a melting point of 125°C (trihydrate) and solubility in water, nickel sulfamate is available as both an aqueous solution and tetrahydrate powder. Its plating baths, characterized by minimal electrodeposition stress and high ductility, allow for high current density and easy control, significantly differing from the stresses of Watts and nickel chloride baths.
Other Information on Nickel Sulfamate
1. Manufacturing Process
Produced by reacting nickel powder or nickel(II) carbonate with sulfamic acid under acidic conditions, nickel sulfamate is formed through a direct combination or carbonate reaction, resulting in its sulfamate form along with by-products.
2. Regulatory Information
While not designated under certain laws, it requires careful handling due to its designation under various environmental and safety regulations.
3. Handling and Storage Precautions
- Store sealed in a cool, dark place and use in well-ventilated areas or outdoors.
- Wear appropriate protective gear, avoid inhalation, and manage exposure promptly with medical advice or treatment.
- Follow thorough hygiene practices post-handling, with specific measures for skin and eye contact.