The rubber wheel can be used to evaluate the abrasive wear resistance of a specimen in accordance with ASTM G65. In the test the abrasive material (e.g. sand) passes over the wear specimen, which is simultaneously pressed against the rotating friction wheel. To evaluate the wear resistance, the volume loss after abrasive wear is determined. For this purpose, the ratio is calculated from the mass difference of the specimen before and after the test and from the density of the specimen.

Technical specification

• Rubber-coated steel wheel with a hardness of 60 Shore-A
• Sample size: 76x25x12,5 mm
• Sand Flow 300-330 g/min (Sand)
• Speed: 200 rpm
• Pressure: 130 N
• Wear path: 1436 m

Application

• Evaluation of the wear resistance
• Determination of mass removal and volume loss after abrasive wear
• Subsequent investigations of wear surfaces possible

The tribocorrosion test rig enables the investigation of sliding wear with simultaneous corrosion phenomena. The material to be tested can thus be fully characterized in terms of its tribocorrosion behavior. Measurements in accordance with ASTM G119 are possible. A two-dimensional load cell is used to record both the normal force and the frictional force, so that the coefficient of friction can be calculated automatically. In addition  sliding wear tests can be carried out in dry running.

Technical specification

• Specimen size: 15x15x2 mm
• Counterbody: Ø 5-8 mm, material freely selectable
• Electrolyte: almost freely selectable, for tribocorrosion investigations conductive electrolytes
• Load: 0,5-50 N
• Wear rate: 0.01-10 mm/s
• Wear path for tribocorrosion: 2 mm

Application

• Characterization of the sliding wear behavior under media lubrication and dry running conditions
• Characterization of the corrosion behavior
• Characterization of tribocorrosion behavior including wear-induced corrosion and corrosion-induced wear
• Determination of the coefficient of friction under media lubrication and dry running conditions
• Subsequent investigation of wear mechanisms and corrosion phenomena possible

Funded by the German Federal Ministry for Economic Affairs and Energy Energy (BMWi, now: Federal Ministry for Economic Affairs and Climate Action, BMWK). The tribocorrosion test rig was acquired in 2013.

The hot wear test rig works on the principle of a wear pot in which the specimens are moved through a free-moving abrasive. The main components of the test rig are a circulating air oven and a special agitator which is guided through the oven ceiling. Up to four specimens can be attached simultaneously to a specimen holder, which is moved by the agitator through a pot filled with abrasive. The entire system can be heated up to 600°C by the surrounding furnace. The abrasive material removal is determined by weighing the sample before and after the test on a precision balance.

Technical specification

• Manufacturer: Fluid-Kotthoff GmbH
• Sample size and shape: Rectangular discs measuring 40 x 21.5 x 5 mm.
• Rotation speed: 40 rpm
• Temperature range: 20-600°C
• abrasive: corundum of grain size F8 (2.2-2.8mm); quartz sand of various grain sizes

Application

• Measurement of abrasive wear at temperatures from 20-600°C.
• Tests under air and under argon atmosphere

Testing rig for sliding wear, sliding wear at elevated temperatures and hot hardness up to 600 °C.

Technical specification

• Manufacturer: Optimol Instruments Prüftechnik GmbH
• Force: max. 100 N
• Temperature: max. 600 °C
• Shielding gas: Ar
• Specimen dimensions: 10x10x4 mm (lxwxh)
• Counter body: any

Application

• Hot hardness measurements up to 600 °C
• Sliding wear testing up to 600 °C