TY - GEN
T1 - The erosion-corrosion of intake valve sealing surfaces due to the formation of lubricating oil deposits
AU - Truhan, John J.
AU - More, Karren L.
AU - Waukesha, Roger S.
PY - 2005
Y1 - 2005
N2 - Intake valves from natural gas-fired reciprocating engines displaying "torching" were examined to determine their failure mechanism. The principal features of the "torched" valves included a relatively thick black deposit on the tulip area of the valve extending to the sealing surface, partial loss of those deposits in various locations, and localized metal loss, oxidation and/or surface cracking in the spalled regions. "Torched" valve sealing surfaces showed metal loss, surface cracking, and oxidation. Nontorched areas retained a compacted oil deposit covering an oxidized sealing surface. The low Cr content resulted in general oxidation in this application due to higher than expected operating temperatures, the presence of water vapor and high gas flow. The torched areas corresponded to regions where a porous deposit had spalled. The oil deposits consisted of a combination of Zn and Ca phosphates originating form the lubricating oil additives. This is an abstract of a paper presented at the World Tribology Congress III (Washington, DC 9/12-16/2005).
AB - Intake valves from natural gas-fired reciprocating engines displaying "torching" were examined to determine their failure mechanism. The principal features of the "torched" valves included a relatively thick black deposit on the tulip area of the valve extending to the sealing surface, partial loss of those deposits in various locations, and localized metal loss, oxidation and/or surface cracking in the spalled regions. "Torched" valve sealing surfaces showed metal loss, surface cracking, and oxidation. Nontorched areas retained a compacted oil deposit covering an oxidized sealing surface. The low Cr content resulted in general oxidation in this application due to higher than expected operating temperatures, the presence of water vapor and high gas flow. The torched areas corresponded to regions where a porous deposit had spalled. The oil deposits consisted of a combination of Zn and Ca phosphates originating form the lubricating oil additives. This is an abstract of a paper presented at the World Tribology Congress III (Washington, DC 9/12-16/2005).
UR - http://www.scopus.com/inward/record.url?scp=33644856928&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33644856928
SN - 079183767X
T3 - Proceedings of the World Tribology Congress III - WTC 2005
BT - Proceedings of the World Tribology Congress III - WTC 2005
T2 - 2005 World Tribology Congress III
Y2 - 12 September 2005 through 16 September 2005
ER -