The Effect Of Different Surface Topographies On
The Corrosion Behaviour Of Nickel
Author(s)
A. S. Toloei, V. Stoilov & D. O. Northwood
Abstract
The electrochemical and corrosion behaviour of a surface is extremely
complicated and depends on various chemical, physical and mechanical factors.
In this study the effect of different surface roughnesses on the corrosion
resistance of nickel in 0.5 M sulphuric acid was investigated. Open circuit
potential, corrosion current density, polarization resistance and corrosion rate
were measured for surfaces polished with different grits (120, 240, 400, 600 and
1200) of silicon carbide papers. The surface roughness was measured using a
profilometry method both before and after corrosion testing. SEM images were
taken and compared for all of the samples before and after corrosion tests. The
results showed that surface roughness and surface morphology can considerably
change corrosion and corrosion rate. A higher corrosion resistance is obtained
for surfaces with lower roughnesses. Finally, the results were compared with
specimens where a specific surface patterning was obtained using a laser ablation
method.
Keywords: corrosion, nickel, surface roughness.
Keywords
corrosion, nickel, surface roughness
Related Book
Other papers in this volume
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