Tribological Behavior of Polyethylene/Light Metal Pairs in Low Viscosity Organic Solvents

Mano

2022

Mater. Trans.

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To evaluate the effect of acetic acid on material removal from stainless steel, sliding tests were performed. Martensitic stainless steel pins were unidirectionally slid against smooth and rough alumina (Al 2 O 3 ) disks in water, in ethanol, in acetic acid aqueous solutions and in acetic acid ethanolic solutions. Morphological and chemical analyses of the worn pin and disk surfaces were then performed. The addition of acetic acid to water and ethanol resulted in reduction of adhesion of stainless steel to Al 2 O 3 , inhibition of the formation of metal oxides, and increased wear of the stainless steel. The surface roughness of the mating Al 2 O 3 disk affected the wear mechanism of the stainless steel pin. The solvents and total concentration of acetic acid in the solution affected electrochemical actions such as anodic dissolution and galvanic corrosion.

Section: Methodsmentioning

confidence: 99%

Material Removal Characteristics of Martensitic Stainless Steel in Acetic Acid Aqueous Solutions and in Acetic Acid Ethanolic Solutions

Mano

2022

Mater. Trans.

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“…Sliding tests were performed using a unidirectional pin-on-disk machine (FPR-2100, RHESCA), which has been described elsewhere. 34) Disks of FC250 cast iron, SUS440C stainless steel, titanium metal and the 5-10-85 composite were slid against SUS440C stainless steel hemispherical pins in ethanol with and without acetic acid with an applied load of 0.49 N, sliding speed of 40 mm/s, sliding time of 100 min and sliding distance of 240 m. The initial mean Hertzian contact pressures between the stainless steel pin and the cast iron, stainless steel and titanium metal disks were 0.35, 0.45 and 0.36 GPa, respectively. The initial mean Hertzian contact pressure between the stainless steel pin and the 5-10-85 composite disk was 0.42 GPa, assuming that the Poisson's ratio of the 5-10-85 composite was 0.3.…”

Section: Sliding Testmentioning

confidence: 99%

Effect of Acetic Acid on Wear Properties of Ferrous and Titanium-Based Materials under Ethanol Lubrication

Mano

2020

Mater. Trans.

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Disks of ferrous and titanium-based material were immersed and unidirectionally slid against a stainless steel pin in ethanol with or without acetic acid to evaluate the effect of acetic acid on wear. The disks were made of cast iron, stainless steel, titanium metal and particulate-reinforced titanium metal matrix composite sintered from mixed powder of Si 3 N 4 (5 mass%), TiN (10 mass%) and Ti (85 mass%). In the absence of sliding, the stainless steel, titanium and composite showed good corrosion resistance but the cast iron exhibited galvanic corrosion. With sliding, the addition of acetic acid to the ethanol increased the wear of the ferrous materials but had little effect on the titanium-based materials. Morphological and chemical analyses of the worn surfaces revealed that acetic acid promoted anodic dissolution of iron on the sliding surfaces of the ferrous materials in ethanol. The results also indicated that titanium and the composite in ethanol with and without acetic acid primary underwent mechanical wear and chemical wear, respectively. The composite exhibited good corrosion and wear resistance in ethanol regardless of the presence of acetic acid.

“…1.083 mPa•s) using a unidirectional pin-on-disk machine. Details of the unidirectional pin-on-disk machine have been described elsewhere [12]. The sliding speed was 40 mm/s, the applied load was 0.49 N, and the sliding distance was 240 m. A Ti disk was also slid against a hemispherical Al 2 O 3 pin (radius: 2 mm, length: 10 mm) under dry conditions or in ethanol under the same conditions.…”

Section: Introductionmentioning

confidence: 99%

Influence of Organic Solvents on Adhesive Wear of Titanium Slid against Ceramics

Ohana

2019

Tribology Online

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To determine the titanium adhesion inhibitory effect of organic solvents on the sliding surface between titanium (Ti) and ceramics, Ti disks were slid against silicon nitride (Si 3 N 4) pins under dry conditions, in n-undecane, and in ethanol using a unidirectional pinon-disk machine. Ti disks were also slid against alumina (Al 2 O 3) pins under dry condition and in ethanol. Contour measurement, microstructural observation and chemical analysis of the worn disk and pin surfaces were performed. Under dry conditions, the substances composed of Ti adhered to the whole of the wear scars of both the Si 3 N 4 pin and Al 2 O 3 pin. n-Undecane and ethanol inhibited the adhesion of Ti to the Si 3 N 4 pin effectively. Tribochemical reaction products seemed to contribute to the wear of the Si 3 N 4 pin/Ti disk pair in n-undecane and in ethanol. The amount of adhesion of Ti to the Al 2 O 3 pin was less in ethanol than under dry conditions. Mechanical wear such as fracture and cutting seemed to be main wear mechanisms of the Al 2 O 3 pin/Ti disk pair in ethanol. Wear of the Ti disk in ethanol was significantly affected by the surface roughness of the wear scar of the mating ceramic pin.