The Importance of Temperature in Generating ZDDP Tribofilms Efficient at Preventing Hydrogen Permeation in Rolling Contacts

Vlad Bogdan Niste, Hiroyoshi Tanaka, Joichi Sugimura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

High-strength steels are particularly susceptible to hydrogen embrittlement and therefore rolling element bearings can experience premature failure that drastically reduces their operation life. Some lubricant additives can prevent this by generating protective tribofilms during operation. This study investigates the effect of temperature on the growth of zinc dialkyl dithiophosphate (ZDDP)-generated tribofilms and the relationship with the permeation of hydrogen in the substrate. Rolling contact tests were conducted using ZDDP at 333, 363, and 393 K and the concentration of hydrogen was measured after the tests. It was found that low temperatures inhibit the reactivity of the additive, leading to an inadequate coverage of the surface that allows dissociation and permeation of hydrogen in the sample. Higher temperatures induce uniform films in the contact, although excessive temperatures can promote unnecessary wear of the substrate. An optimum temperature can balance the two main processes occurring in the contact related to the reactivity of the additive: the growth of a protective film and the corrosive wear of the material.

Original languageEnglish
Pages (from-to)930-937
Number of pages8
JournalTribology Transactions
Volume61
Issue number5
DOIs
Publication statusPublished - Sep 3 2018

Fingerprint

Permeation
Zinc
Hydrogen
zinc
hydrogen
reactivity
hydrogen embrittlement
high strength steels
lubricants
Bearings (structural)
Temperature
temperature
Wear of materials
Caustics
Hydrogen embrittlement
dissociation
Protective coatings
Substrates
High strength steel
Lubricants

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

@article{7e8bc16df7f644019677947a0d58ddd0,
title = "The Importance of Temperature in Generating ZDDP Tribofilms Efficient at Preventing Hydrogen Permeation in Rolling Contacts",
abstract = "High-strength steels are particularly susceptible to hydrogen embrittlement and therefore rolling element bearings can experience premature failure that drastically reduces their operation life. Some lubricant additives can prevent this by generating protective tribofilms during operation. This study investigates the effect of temperature on the growth of zinc dialkyl dithiophosphate (ZDDP)-generated tribofilms and the relationship with the permeation of hydrogen in the substrate. Rolling contact tests were conducted using ZDDP at 333, 363, and 393 K and the concentration of hydrogen was measured after the tests. It was found that low temperatures inhibit the reactivity of the additive, leading to an inadequate coverage of the surface that allows dissociation and permeation of hydrogen in the sample. Higher temperatures induce uniform films in the contact, although excessive temperatures can promote unnecessary wear of the substrate. An optimum temperature can balance the two main processes occurring in the contact related to the reactivity of the additive: the growth of a protective film and the corrosive wear of the material.",
author = "Niste, {Vlad Bogdan} and Hiroyoshi Tanaka and Joichi Sugimura",
year = "2018",
month = "9",
day = "3",
doi = "10.1080/10402004.2018.1447180",
language = "English",
volume = "61",
pages = "930--937",
journal = "Tribology Transactions",
issn = "1040-2004",
publisher = "Taylor and Francis Ltd.",
number = "5",

}

TY - JOUR

T1 - The Importance of Temperature in Generating ZDDP Tribofilms Efficient at Preventing Hydrogen Permeation in Rolling Contacts

AU - Niste, Vlad Bogdan

AU - Tanaka, Hiroyoshi

AU - Sugimura, Joichi

PY - 2018/9/3

Y1 - 2018/9/3

N2 - High-strength steels are particularly susceptible to hydrogen embrittlement and therefore rolling element bearings can experience premature failure that drastically reduces their operation life. Some lubricant additives can prevent this by generating protective tribofilms during operation. This study investigates the effect of temperature on the growth of zinc dialkyl dithiophosphate (ZDDP)-generated tribofilms and the relationship with the permeation of hydrogen in the substrate. Rolling contact tests were conducted using ZDDP at 333, 363, and 393 K and the concentration of hydrogen was measured after the tests. It was found that low temperatures inhibit the reactivity of the additive, leading to an inadequate coverage of the surface that allows dissociation and permeation of hydrogen in the sample. Higher temperatures induce uniform films in the contact, although excessive temperatures can promote unnecessary wear of the substrate. An optimum temperature can balance the two main processes occurring in the contact related to the reactivity of the additive: the growth of a protective film and the corrosive wear of the material.

AB - High-strength steels are particularly susceptible to hydrogen embrittlement and therefore rolling element bearings can experience premature failure that drastically reduces their operation life. Some lubricant additives can prevent this by generating protective tribofilms during operation. This study investigates the effect of temperature on the growth of zinc dialkyl dithiophosphate (ZDDP)-generated tribofilms and the relationship with the permeation of hydrogen in the substrate. Rolling contact tests were conducted using ZDDP at 333, 363, and 393 K and the concentration of hydrogen was measured after the tests. It was found that low temperatures inhibit the reactivity of the additive, leading to an inadequate coverage of the surface that allows dissociation and permeation of hydrogen in the sample. Higher temperatures induce uniform films in the contact, although excessive temperatures can promote unnecessary wear of the substrate. An optimum temperature can balance the two main processes occurring in the contact related to the reactivity of the additive: the growth of a protective film and the corrosive wear of the material.

UR - http://www.scopus.com/inward/record.url?scp=85048466886&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048466886&partnerID=8YFLogxK

U2 - 10.1080/10402004.2018.1447180

DO - 10.1080/10402004.2018.1447180

M3 - Article

AN - SCOPUS:85048466886

VL - 61

SP - 930

EP - 937

JO - Tribology Transactions

JF - Tribology Transactions

SN - 1040-2004

IS - 5

ER -