Fretting corrosion of steels for lead alloys cooled ADS

Abstract Fretting is a particular type of wear that is expected to occur in a molten lead alloy cooled ADS due to the flow induce vibrations and that mainly affects fuel claddings and heat exchanger tubes. A dedicated facility (i.e. FRETHME) was designed and realized to investigate for the first time fretting in liquid lead alloys at reactor relevant conditions. Several fretting tests, were performed on candidate steels such as the f/m T91 steel, the austenitic 15-15Ti steel and Al surface alloyed T91 (GESA-T91). The experimental outcomes highlighted that the fretting damage increases with the increasing number of cycles/time and temperature. Fretting interacts with the corrosion mechanisms occurring in liquid Pb alloys (fretting corrosion) and destabilizes the corrosion barriers, favoring e.g. dissolution attacks. Due to the favorable wear and corrosion resistance properties of the surface alloyed layer, GESA-T91 steel showed the best fretting corrosion behavior up to 550 °C. On the contrary, due to the high Ni content, the 15-15Ti steel is affected by dissolution enhanced fretting; while oxidation enhanced fretting characterizes T91 steel at temperatures higher than 500 °C. In this respect, dedicated tests suggested that besides the use of aluminized steels, possible countermeasures to mitigate the fretting impact are the use of pre-oxidized components and Ni-enriched liquid Pb.

[1]  P. L. Hurricks.  Some metallurgical factors controlling the adhesive and abrasive wear resistance of steels. A review , 1973 .

[2]  Jinsuo Zhang,et al.  Analysis on liquid metal corrosion–oxidation interactions , 2007 .

[3]  Jiajun Liu,et al.  The effect of the third body on the fretting wear behavior of coatings , 2002 .

[4]  Jinsuo Zhang,et al.  Review of the studies on fundamental issues in LBE corrosion , 2008 .

[5]  Frank Zimmermann,et al.  Experimental equipment for fretting corrosion simulation in heavy liquid metals for nuclear applications , 2012 .

[6]  Thomas Farris,et al.  High-frequency, high-temperature fretting-fatigue experiments , 2006 .

[7]  Frank Zimmermann,et al.  Investigation on oxygen controlled liquid lead corrosion of surface treated steels , 2000 .

[8]  M. Attia.  On the fretting wear mechanism of Zr-alloys , 2006 .

[9]  Alfons Weisenburger,et al.  Oxide scale formation of modified FeCrAl coatings exposed to liquid lead , 2012 .

[10]  R. Waterhouse,et al.  The fretting wear of an austenitic stainless steel in air and in carbon dioxide at elevated temperatures , 1979 .

[11]  Stefano Mischler,et al.  Third body effects on friction and wear during fretting of steel contacts , 2011 .

[12]  A. Iwabuchi.  The role of oxide particles in the fretting wear of mild steel , 1991 .

[13]  A. Weisenburger,et al.  T91 cladding tubes with and without modified FeCrAlY coatings exposed in LBE at different flow, stress and temperature conditions , 2008 .

[14]  Alfons Weisenburger,et al.  Control of oxygen concentration in liquid lead and lead-bismuth , 2003 .

[15]  U. Krupp,et al.  Effect of alloy grain size on the high-temperature oxidation behavior of the austenitic steel TP 347 , 2005 .

[16]  P. L. Hurricks.  The fretting wear of mild steel from room temperature to 200°C , 1972 .

[17]  A. Weisenburger,et al.  Behavior of steels in flowing liquid PbBi eutectic alloy at 420–600 °C after 4000–7200 h , 2004 .

[18]  E. Sproles,et al.  The mechanism of material removal in fretting , 1978 .

[19]  G. P. Karzov,et al.  Structural materials for atomic reactors with liquid metal heat-transfer agents in the form of lead or lead—Bismuth alloy , 1999 .

[20]  A. I. Rusanov,et al.  Generalization of the Gibbs-Kelvin-Kohler and Ostwald-Freundlich equations for a liquid film on a soluble nanoparticle. , 2008, The Journal of chemical physics.

[21]  P. L. Hurricks.  The fretting wear of mild steel from 200° to 500°C , 1974 .

[22]  R. Pendlebury.  Formation, readhesion and escape of wear particles in fretting and sliding wear in inert and oxidizing environments , 1988 .

[23]  M. Helmi Attia,et al.  Fretting fatigue and wear damage of structural components in nuclear power stations—Fitness for service and life management perspective , 2006 .

[24]  Frank Zimmermann,et al.  Results of steel corrosion tests in flowing liquid Pb/Bi at 420-600 °C after 2000 h , 2002 .

[25]  Nigel J. Fisher,et al.  Fretting-wear of zirconium alloys , 2002 .

[26]  G. H. Nancollas,et al.  A New Understanding of the Relationship Between Solubility and Particle Size , 1998 .

[27]  Hyung-Kyu Kim,et al.  Mechanical and experimental investigation on nuclear fuel fretting , 2006 .

[28]  Jinsuo Zhang,et al.  A review of steel corrosion by liquid lead and lead–bismuth , 2009 .

[29]  F. Balbaud-Célérier,et al.  High temperature oxidation of Fe-9Cr-1Mo steel in stagnant liquid lead-bismuth at several temperatures and for different lead contents in the liquid alloy , 2008 .