Using Pre-treated Carbon Steel for Post-combustion Carbon Capture Infrastructure.

The reduction of capital cost in building post-combustion CO 2 capture is necessary to realize its widespread use. Cheaper steels, e . g . carbon steel, are attractive but lack the necessary corrosion resistance. To protect from corrosion, one approach is to implement a protective coating on the surface. Particularly, a coating like siderite (FeCO 3 ) is appealing because it can be formed by amines and therefore could be regenerated. This study investigates the formation, over seven days at 40 and 80 °C, of such siderite layers formed in methyldiethanolamine (MDEA), 2-amino-2-methyl-1-propanol (AMP), and a K 2 CO 3 solution. When tested against 2.5 M monoethanolamine for 28 days, the coatings formed at 80 °C in MDEA and AMP appear the most resilient. There is a substantial siderite crystal layer remaining on the surface and only minimal weight loss. [ABSTRACT FROM AUTHOR]