Acceleration of phosphating processes by electrochemical methods

Summary

Electrochemical acceleration using potentiostatic control has revealed that in zinc-containing solutions two passive regions occur. The first region of -400 to -100m V (SCE) corresponds to the formation of hopeite; the second region of +400 to + 1400mV(SCE) corresponds to the formation of phosphophyllite. For manganese-containing solutions only one passive region occurs. The coatings produced were characterised by high coating weights (15–30g/m²) and low porosity values (<0.5%).

Additional information

Notes on contributors

K. A. Akanni

K. A. Akanni graduated originally in metallurgy at the University of Ife, Nigeria in 1981. He then spent the year 1981–2 at Loughborough University of Technology taking the MSc degree in Materials Protection before proceeding to the University of California at Berkeley for further postgraduate studies in the department of mineral science.

C. P. S. Johal

C. P. S. Johal graduated in metallurgy and management at Brunei University in 1982 before proceeding to Loughborough University o f Technology, taking the MSc degree in 1983. He is continuing research in the department of Materials Engineering and Design in the field of alloy electrodeposition.