A. Iwabuchi et al., Application of potential pulse method to the corrosion behavior of the fresh surface formed by scratching and sliding in corrosive wear, WEAR, 229(1), 1999, pp. 181-189
Corrosive wear in an electrolyte solution is controlled by both mechanical
and electrochemical factors. The authors have found in previous papers that
the latter was very significant for type 304 stainless steel under recipro
cating sliding. Especially, the corrosion rate at the fresh surface formed
by mechanical action, i.e., sliding, is higher than at normal surfaces, and
the corrosion behavior can be estimated by the current density obtained fr
om the potential pulse method (PPM). In this paper the authors verify the a
dequacy of the estimation method above for scratching and unidirectional sl
iding conditions. Specimens used were pure iron and type 304 steel, and a s
cratch indenter was an Al2O3 tip, which was dropped on the rotating specime
n surface in 0.1 M Na2SO4 solution at different potentials. The result show
ed that the electric charge density passed through the specimen under the s
cratch and unidirectional sliding almost coincided with the estimated value
from the PPM. Therefore, it was concluded that the current density from th
e PPM can be applied to the estimation of the corrosion rate at the fresh s
urface in corrosive wear. (C) 1999 Elsevier Science S.A. All rights reserve
d.