| Title |
Review Paper : Development of Sulfuric and Hydrochloric Acid Dew-Point Corrosion-Resistant Steels: 1，Effect of Alloying Elements on the Corrosion Resistance of Low-Alloy Steels |
| Authors |
박선아(Sun Ah Park); 김정구(Jung Gu Kim); 이병호(Byoung Ho Lee); 윤정봉(Jung Bong Yoon) |
| DOI |
https://doi.org/10.3365/KJMM.2014.52.11.837 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloys; rolling; corrosion; scanning electron microscopy，SEM; acid dew-point corrosion |
| Abstract |
Carbon steels requires the corrosion resistance against sulfuric and hydrochloric acid dew-point corrosion at the low temperature section of FGD systems. The design of the corrosion-resistant steels was focused on a small number of conventional alloying elements such as Cu, Sb, W, Mo, Cr, Mn, Nb, Al, Co, P. The corrosion rate decreased in the following order: P > Blank > Cr, Co, Al, Nb, Mn, W, Mo ≫ Cu. The Cu-containing steel presents the lowest corrosion rates due to the accumulated Cu compound, Cu and Cu oxides, on the surface. The corrosion rate decreased in the following order: Cu-Cr, Cu-Mo > Cu > Cu-W > Cu-Sb. W, Mo and Cr is not effective with Cu content. Addition of Sb not only created a protective Sb oxides film on the steel surface, but also accelerated the reaction of copper deposition through the adsorbed complex salt, Cu-Sb species. (Received July 3, 2014) |