Laser cleaning of sulfide scale on compressor impeller blade

Abstract Sulfide scale on the surface of a compressor impeller blade can considerably reduce the impeller performance and its service life. To prepare for subsequent remanufacturing, such as plasma spraying, it needs to be removed completely. In the corrosion process on an FV(520)B stainless steel, sulfide scale is divided into two layers because of different outward diffusion rates of Cr, Ni and Fe. In this paper, the cleaning threshold values of the upper and inner layers and the damage threshold value of the substrate were investigated using a pulsed fiber laser. To obtain experimental evidence, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and 3D surface profilometry were employed to investigate the two kinds of sulfide layers on specimens before, during, and after laser cleaning.

[1]  H. Man,et al.  Effect of temperature, pH and sulphide on the cavitation erosion behaviour of super duplex stainless steel , 1997 .

[2]  D. Blackwood,et al.  Real time pit initiation studies on stainless steels : The effect of sulphide inclusions , 2007 .

[3]  J. Belzunce,et al.  Study of sulphidation and chlorination on oxidized SS310 and plasma-sprayed Ni-Cr coatings as simulation of hot corrosion in fouling and slagging in combustion , 2006 .

[4]  H. Nelson,et al.  Influence of temperature and the role of chromium on the kinetics of sulfidation of 310 stainless steel , 1978 .

[5]  S. Mrowec,et al.  The mechanism of high temperature sulphur corrosion of nickel-chromium alloys , 1966 .

[6]  Vincenzo Nassisi,et al.  Laser cleaning of a bronze bell , 2013 .

[7]  Roland Oltra,et al.  Preliminary study on the laser cleaning of stainless steels after high temperature oxidation , 2000 .

[8]  N. Cho,et al.  Study on surface properties of gilt-bronze artifacts, after Nd:YAG laser cleaning , 2013 .

[9]  Minghui Hong,et al.  Laser surface cleaning of carbonaceous deposits on diesel engine piston , 2013 .

[10]  C. H. Lee,et al.  Sulfidation Behavior of Inconel 738 Superalloy at 500–900°C , 2001 .

[11]  Mool C. Gupta,et al.  Surface preparation of Ti–3Al–2.5V alloy tubes for welding using a fiber laser , 2009 .

[12]  J. B. Wagner,et al.  Chemical diffusion and electrical conductivity of Ni3+-xS2 , 1982 .

[13]  Costas P. Grigoropoulos,et al.  Laser cleaning of surface contaminants , 1998 .

[14]  S. Mrowec,et al.  Chemical diffusion in non-stoichiometric metal sulphides , 1995, Journal of Materials Science.

[15]  Dhruba J. Biswas,et al.  Laser cleaning of tungsten ribbon , 2014 .

[16]  Demetrios Anglos,et al.  Excimer laser restoration of painted artworks: procedures, mechanisms and effects , 1998 .

[17]  L. Jiajun,et al.  Effect of sulphide layers on the tribological behavior of steels under boundary lubrication conditions , 2001 .