Hydrogen desorption and internal stress in nickel coatings obtained by periodic electrodeposition

Article abstract of DOI:10.1149/1.2069098

Periodic electrodeposition is performed in order to determine to what extent a change in conditions for the desorption of hydrogen from nickel deposits, which is occluded during plating, can affect their internal stress. The duration of the pause (zero current), τ_off, is varied in the range 0-900 s and the plating period, τ_on = 120 s, is kept constant, maintaining the structure unchanged. The variations of internal stress, microhardness, and coercivity of the electrodeposits obtained at different τ_off, are investigated. The amounts of hydrogen leaving the coating, both during the pauses and after the deposition is completed, are determined. A proof of the mechanical nature of intensive hydrogen codeposition at the beginning of nickel electroplating is obtained. It is shown that the desorption of hydrogen is responsible to a considerable extent for the high tensile internal stress observed in similar coatings.

Full text of DOI:10.1149/1.2069098

Downloaded on 2014-09-08 to IP 134.129.182.74 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-09-08 to IP 134.129.182.74 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-09-08 to IP 134.129.182.74 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-09-08 to IP 134.129.182.74 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).