“…3a–e. The observed features depend the metal oxide films that covered on the wear surfaces 28 .Figure 3SEM images of wear surfaces of the 304 ring-discs tested in ( a ) 0%, ( b ) 10%, ( c ) 30%, ( d ) 50%, and ( e ) 70% H 2 O 2 solutions and ( f ) surface roughness of the wear surfaces.
…”
Stainless steel is widely used in strongly oxidizing hydrogen peroxide (H2O2) environments. It is crucial to study its wear behaviour and failure mode. The tribological properties and oxidation of 304 stainless steel were investigated using a MMW-1 tribo-tester with a three-electrode setup in H2O2 solutions with different concentrations. Corrosion current densities (CCDs), coefficients of frictions (COFs), wear mass losses, wear surface topographies, and metal oxide films were analysed and compared. The results show that the wear process and oxidation process interacted significantly with each other. Increasing the concentration of H2O2 or the oxidation time was useful to form a layer of integrated, homogeneous, compact and thick metal oxide film. The dense metal oxide films with higher mechanical strengths improved the wear process and also reduced the oxidation reaction. The wear process removed the metal oxide films to increase the oxidation reaction. Theoretical data is provided for the rational design and application of friction pairs in oxidation corrosion conditions.
“…3a–e. The observed features depend the metal oxide films that covered on the wear surfaces 28 .Figure 3SEM images of wear surfaces of the 304 ring-discs tested in ( a ) 0%, ( b ) 10%, ( c ) 30%, ( d ) 50%, and ( e ) 70% H 2 O 2 solutions and ( f ) surface roughness of the wear surfaces.
…”
Stainless steel is widely used in strongly oxidizing hydrogen peroxide (H2O2) environments. It is crucial to study its wear behaviour and failure mode. The tribological properties and oxidation of 304 stainless steel were investigated using a MMW-1 tribo-tester with a three-electrode setup in H2O2 solutions with different concentrations. Corrosion current densities (CCDs), coefficients of frictions (COFs), wear mass losses, wear surface topographies, and metal oxide films were analysed and compared. The results show that the wear process and oxidation process interacted significantly with each other. Increasing the concentration of H2O2 or the oxidation time was useful to form a layer of integrated, homogeneous, compact and thick metal oxide film. The dense metal oxide films with higher mechanical strengths improved the wear process and also reduced the oxidation reaction. The wear process removed the metal oxide films to increase the oxidation reaction. Theoretical data is provided for the rational design and application of friction pairs in oxidation corrosion conditions.
“…As is shown in figure 6(a) (1), with poor shear resistance and low hardness, the tear scratches appeared obviously under the action of cutting and the shear damage occurred in the deep surface of the low acrylonitrile content N18 sample. The cracks expanded from the rubber surface to the inside resulting in rough fracture of the larger wear debris [6]. With the increase of the acrylonitrile content, the shear layer appeared in the surface layer due to the reinforced hardness.…”
Section: Analysis Of Swelling Effects On Tribological Properties Of Tmentioning
confidence: 99%
“…Therefore, many researches have dedicated to the research of the wear mechanisms of nitrile-butadiene rubber materials. Dong et al [6] experimentally studied the mechanical and tribological properties of the NBRs. The results showed that the mechanical and tribological properties of the NBRs are affected by aging and elevated temperature under dry conditions with the reduction of the tensile strength and tear strength as well as the increase of the wear mass loss.…”
When nitrile rubber contacting with water under the external force during the service life, swelling and sliding wear occur. Since nitrile has similar polarity to water, the interaction between water and nitrile rubber and its influence on mechanical and tribological behaviors of the nitrile rubber play an important role in rubber performance, which is extremely necessary to be studied systematically. In this study, immersion experiments were conducted on three nitrile rubber samples which contained different acrylonitrile weight percentages of 18%, 26% and 41% (i.e. N18, N26, and N41) respectively. The hardness, tensile, dry and wet unidirectional sliding wear tests were further conducted. To reveal the mechanisms, the nuclear magnetic resonance (NMR) analysis and scanning electron microscopy (SEM) analysis were performed and interpreted accordingly. The results showed that cross-linking break based structural damage, substance dissolution and surface layer defects occurred after swelling, resulting in decreases in hardness and tensile strength and increases in permanent deformation fracture rates of the nitrile rubbers. The friction coefficient value of the un-swollen NBRs was positively related to the wear loss and decreased with the increase of the acrylonitrile content. During the wear process under dry conditions, the un-swollen rubbers presented hardening in aging while the swollen samples softened along with the deterioration of adhesive wear with higher steady-state friction coefficient value and wear loss. Under wet friction conditions, the susceptible wear behavior of the swollen rubbers induced reductions in friction coefficient and increases in wear loss. The swelling degree and its effects on mechanical and tribological behavior decreased with the increase of the acrylonitrile content. The swelling influences on the tribological behavior of nitrile rubber affected and acted on the entire wear process.
“…The Nominal Projected Pressure (NPP, NPP ¼applied bearing radial load/(bearing length  journal diameter)) is from 0.28 to 0.70 MPa. Because the temperature has a significant effect on the friction and wear properties [13,14], the flow speed of the lubricant, clean tap water, is regulated to keep the tank water temperature rise less than 6 1C. The air temperature in the lab keeps about 20 1C.…”
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