Wear-corrosion study of white cast irons

The effect of an impinging liquid-solid jet on the electrochemical corrosion of stainless steels

“…Firstly, under liquid-solid erosion conditions the free corrosion potential is shifted in the negative potential direction by 200 ± 300 mV compared with the values under static conditions which is in agreement with the observations of Watson et al [10] where the stainless steel surface is`activated' under abrasion-corro- sion conditions. Firstly, under liquid-solid erosion conditions the free corrosion potential is shifted in the negative potential direction by 200 ± 300 mV compared with the values under static conditions which is in agreement with the observations of Watson et al [10] where the stainless steel surface is`activated' under abrasion-corro- sion conditions.…”

“…Firstly, under liquid-solid erosion conditions the free corrosion potential is shifted in the negative potential direction by 200 ± 300 mV compared with the values under static conditions which is in agreement with the observations of Watson et al [10] where the stainless steel surface is`activated' under abrasion-corro- sion conditions. This is in agreement with the findings of others where active corrosion has been recorded in tri-bo-corrosion conditions [9,10] and is in contrast with the passive behaviour shown on stainless steels under solid free impingement at velocities up to 100 m/s [7]. Ennoblement would tend to suggest a lowering of the rate of anodic processes on the surface yet measurement of the polarisation resistance as a function of time in accompanying work [12] showed this not to be the case.…”

Effects of cathodic protection on corrosive wear of 304 stainless steel

“…cathodic protection has been widely used to control corrosion of marine and underground structures, water storage tanks, gas pipelines, oil platform supports, and many more facilities that are exposed to corrosive environments. Cathodic protection has also been used to determine the contribution of wear to total material loss in corrosive wear processes [11][12][13]. The basic principle of cathodic protection is the reduction of metal dissolution or oxidation reaction in a corrosive solution by applying a cathodic current or cathodic potential, which brings the metal closer to an immune state [14].…”

Effects of the Destabilisation Heat Treatments on the Precipitation of Secondary Carbides and Their Effect on the Corrosion of 27 wt.% Chromium White Cast Iron

“…It was found that the matrix acted as a sacrificial anode, since the corrosion potential of the carbides was believed to be more noble than that of the matrix. 16) Therefore, in the corrosion of high chromium white cast iron, the matrix phase is very important because it is responsible for the corrosion behavior of the alloy. Corrosion of alloy involves the damage of surfaces by electrochemical metallic dissolution.…”