Chemical nickel plating in tartrate solutions with borohydride reducing agent
The authors investigate the influence of various factors on the rate of chemical nickel plating in strongly alkaline tartrate solutions with a borohydride reducing agent. After 30 min of the process of nickel plating, the final concentration of sodium borohydride decreases to 0.26 g/liter, leading to stoppage of the process. The nickel plating process can be intensified by increasing the concentration of sodium hydroxide in the solution, suppressing hydrolysis of borohydride, and also by introducing additives which suppress hydrolysis of borohydride. For chemical deposition of nickel-boron coatings from tartrate solutions the authors recommend the following composition (g/liter): nickel chloride 15-25, Rochelle salt 450-550, sodium hydroxide 140-160, sodium borohydride 0.8-1.0, thallium nitrate 0.003-0.008. The process temperature is 92-95 C, and the deposition rate is 4-6 um/h.
- Research Organization:
- A.A. Zhanov Polytechnic, Gorkii
- OSTI ID:
- 5165048
- Journal Information:
- Prot. Met. (Engl. Transl.); (United States), Journal Name: Prot. Met. (Engl. Transl.); (United States) Vol. 21:6; ISSN PTNMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METAL COMPOUNDS
BORON
BORON COMPOUNDS
BORON HYDRIDES
CARBOXYLIC ACID SALTS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
COATINGS
COPPER
DEPOSITION
ELECTRODEPOSITED COATINGS
ELECTRODEPOSITION
ELECTROLYSIS
ELECTROLYTES
ELECTROPLATING
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
KINETICS
LYSIS
METALS
MOLYBDENUM
NICKEL
PLATING
POTASSIUM COMPOUNDS
PROTECTIVE COATINGS
REACTION KINETICS
REDOX POTENTIAL
REDUCING AGENTS
ROCHELLE SALT
SEMIMETALS
SODIUM COMPOUNDS
SURFACE COATING
TARTRATES
TRANSITION ELEMENTS
TUNGSTEN