Abstract
Stress, hardness, and elongation of duplex nickel plating electrodeposited in Watts bath by adding(1) butynediol+CH3COOHor (2) coumarin+HCHOwere measured, and the following results were obtained.(1) The plating deposited in Watts bath by adding butynediol only was a bright plating with greater stress (40-70×103psi), higher hardness (400-600Hv), and less elongation. When 2g/l or more of CH3COOH was further added to the above bath, semi-bright nickel plating with less stress (10-15×103psi), lower hardness (200-250Hv), and greater elongation was obtained.(2) Stress of the plating deposited in Watts bath by adding coumarin only was less than that deposited in Watts bath with no additives. However, when more than 0.01g/l of coumarin was added, hardness increased to higher than 500Hv. When coumarin added was less than 0.01g/l, semi-bright nickel plating with greater elongation was obtained and when a small amount of HCHO was further added, the plating was more improved.Appropriate conditions of the electrolysis were at pH=4.0, temperature=50°C, and with air agitation. When pH and temperature were higher, bright nickel plating with greater stress, higher hardness, and less elongation was obtained.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
