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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2011

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The energy approach to electrochemical corrosion studies of nano-copper coatings

Trzaska M., Trzaska Z.

Journal of Achievements in Materials and Manufacturing Engineering

2011

Vol. 49, nr 1

42--52

Purpose: The paper presents research results on energy impacts and effects of corrosion of electrodeposited nano- and microcrystalline copper surface layers and involve activation energy and mass transfer effects. Design/methodology/approach: The activation energy and mass transfer effects indicate effectiveness of one-period energy approach in the control of the corrosion resistance of copper deposits. Properties of coatings are examined. Findings: Loops of one-period energy dissipated during the corrosion of electrodeposits were determined. Non-sinusoidal periodic excitations of the corrosion cell and integrations of response waveforms were taken into account. The corrosion energy is expressed by the area of the loop on the energy phase plane. The influences of supplying voltage on the topography, morphology and surface roughness of the electrodeposits were examined. Research limitations/implications: The approach is suitable for system operating under non-sinusoidal periodic conditions. The main feature lies in the elimination of the frequency analysis and gives significant simplifications of the corrosion rate measurements realized with a computer processing system or function generator and digital oscilloscope. Practical implications: The important implications consist in complete eliminations of Fourier series analysis and direct exhibitions of susceptibilities of the studied material to corrosion through evaluations of one-period energy loops. The approach involves more physically exact insights on non-sinusoidal influences of environments. Originality/value: The original value consists on introduction of the energy state variables and representing the absorbed energy during the corrosion tests by the area of one-period energy loops. The novelty lies on the identification of various crystalline structures susceptibility on corrosion destructions.