Development of Sulfuric and Hydrochloric Acid Dew-Point Corrosion-Resistant Steels: 1. Effect of Alloying Elements on the Corrosion Resistance of Low-Alloy Steels

作者：Park Sun Ah; Kim Jung Gu; Lee Byoung Ho^*; Yoon Jung Bong

来源：Journal of Korean Institute of Metals and Materials, 2014, 52(11): 837-855.

DOI：10.3365/KJMM.2014.52.11.837

• alloys
• rolling
• corrosion
• scanning electron microscopy (SEM)
• acid dew-point corrosion

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%26gt; Blank %26gt; Cr, Co, Al, Nb, Mn, W, Mo %26gt; 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 %26gt; Cu %26gt; Cu-W%26gt; 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.

• 出版日期2014-11