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Typical application: when power generating boiler functions, the masses of gases such as SO2 and H2S and so on produced from high-sulphur coal burning will generate free-stuff sulphur atom in the high temperature environment. The free-stuff sulphur atom then reacts with the heating surface of the boiler and produces high-temperature corrosive sulphides such as FeS. The FeS will not protect the boiler surface for its porous and loosen structure. The SX-601 high-temperature and corrosion resistant powder-cored spray wire is developed by the researchers from our company and TAFA and made through nano-coacervating technology.
Main ingredient
Ni, Cr, Ti
The effect of Ni in coating
Ni has stable cubic structure and good ductility that makes the coating having nearly the same heat expansion coefficient with boiler tube.
The effect of Cr in coating
Cr can improve the anti-sulfurizing performance of Ni-Cr alloy, and the Cr2O3 protection surface has good wearable ability.
The effect of Ti in coating
Ti can improve the bond strength of coating and it can form a spinel type structure along with Cr and Oxygen.
Performance of SX-601 coating
High-temperature resistant，anti-abrasive wear, abrasion-resistant, fretting, working temperature＜900°C
SX-601 basic parameters of coating
Bond strength ≥50Mpa
Thickness ≥0.35mm
Hardness ≥HRC45
Porosity ≤1%
Effective protecting period：4 years
Heat transfer coefficient：38—45w/m. k
linear expansion coefficient：12×10^-6／℃
