Long-term corrosion resistance of Al–Ni-plated material and Al-plated material in molten carbonate environment

Research on Preparation and Properties of Al-Mn Alloy Coating in NaCl-KCl-AlCl₃-NdCl₃ Molten Salts

“…Aluminum and its alloys exhibit superior properties such as low density, corrosion resistance, and high specific strength. High quality composite materials can be derived from these metals when used as surface coatings [1][2]. The amorphous structure of Al-Mn alloy coatings, which have been studied since 1970, has aroused popular interest because of their good scalability, processing, and high corrosion resistance during salt spray tests.…”

Influence of Aluminum Depletion on the Lifetime of an Al-Fe Coating in Eutectic (Li,K)<SUB>2</SUB>CO<SUB>3</SUB> at 650&deg;C

“…Consequently, coating systems such as Al-Fe or Al-Ni have been applied in order to increase the corrosion resistance of those stainless steels. [4][5][6][7][8] Aluminum in these coatings reacts with molten carbonate and develops a scale such as LiAlO 2 on the coating surface during MCFC operation. Following this, the LiAlO 2 scale forms a continuous and protective layer, preventing separator plates from the wet-seal corrosion.…”

“…Following this, the LiAlO 2 scale forms a continuous and protective layer, preventing separator plates from the wet-seal corrosion. 1,[4][5][6][7][8] However, if any coating does not originally contain enough aluminum content, or the aluminum content in the coating decreases to a critical level for some reason during MCFC operation, a stable and continuous LiAlO 2 protective layer can no longer be maintained. Instead, less protective layers such as LiFeO 2 build up, indicating that the coating loses its endowed function.…”