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- W2494489788 abstract "The present work examines how tribologically-penetrated hydrogen affects the abrasive wear of mild steel in H2SO4 solution. The pin-on-disc type wear tests were carried out as a function of applied load at 298 K in 0.5 M H2SO4 aqueous solution in the presence and absence of 10−4 As2O3 mol I−1 as a hydrogen recombination poison with and without concurrent hydrogen-charging into the mild-steel pin specimen. Hydrogen-charging was electrolytically made for 4 h as a function of current density of 0.5 to 100 mA cm−2. Subsequently, hydrogen-extraction measurements were performed from the worn pin specimen by using electrochemical hydrogen permeation technique, in order to determine the amount of hydrogen tribologically-penetrated into the pin specimen. The increased amount of the penetrated hydrogen by abrading action indicated tribologically-enhanced hydrogen penetration. The amount of penetrated hydrogen increased with charging current density or by addition of hydrogen recombination poison. As the current density increased, the corrosive-wear rate decreased and then increased, regardless of applied load or addition of hydrogen recombination poison. This indicated that a critical amount of the penetrated hydrogen exists, which is necessary for transition to cracking and dominates the mechanism in abrasive wear. Two-staged variation of the corrosive-wear rate with respect to the amount of penetrated hydrogen is discussed in terms of ploughing/cutting to cutting/cracking transition in the mechanism of abrasive wear. Die vorliegende Arbeit untersucht, wie der tribologisch penetrierte Wasserstoff den Furchungsverschleiß von unlegierten Stählen in einer schwefelsäurehaltigen Lösung beeinflußt. Die Stift-Ring-Versuche wurden in Abhängigkeit von der angelegten Beanspruchung bei Raumtemperatur in 0,5 M H2SO4-haltiger Lösung mit und ohne gleichzeitiger elektrolytischer Wasserstoffbeladung der Stahlproben bei verschiedenen kathodischen Stromdichten von 0,5–100 mA cm−2 durchgeführt. Anschließend wurden noch Wasserstoffauszugsmessungen an den abgetragenen Stift-Proben mit Hilfe einer elektrochemischen Wasserstoffpermeationsmethode ausgeführt, um die tribologisch penetrierte Wasserstoffmenge zu bestimmen. Die erhöhte Wasserstoffpenetration durch Abrasion weist auf verschleißinduzierte Wasserstoffpenetration hin. Der penetrierte Wasserstoff nimmt mit zunehmender kathodischer Stromdichte und durch Zugabe eines Promotors während der Abrasion zu. Die Furchungsverschleißrate nimmt mit zunehmender Stromdichte zunächst ab und dann zu, unabhängig von angelegten Beanspruchungen oder Zugaben des Promotors. Dies deutet darauf hin, daß eine zum Übergang zu rißbildendem Abrasionsmechanismus nötige kritische Wasserstoffpenetrationsmenge existiert. Die zweistufige Änderung der Korrosionsverschleißrate wird in Abhängigkeit von der Wasserstoffpenetrationsmenge anhand des Überganges von riefenbildenden/spanbildenden zu spanbildenden/rißbildenden Furchungsverschleißmechanismen unter korrosiver Umgebung erörtert." @default.
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- W2494489788 date "1991-07-01" @default.
- W2494489788 modified "2023-10-18" @default.
- W2494489788 title "Effects of tribologically-penetrated hydrogen on the abrasive wear of mild steel in H2SO4solution" @default.
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- W2494489788 doi "https://doi.org/10.1002/srin.199101301" @default.
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