The effect of NaCl deposit and thermal cycle on an aluminide layer coated on 310 stainless steel

Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant

“…The aluminide coating on stainless steel did not perform as well as the coating on the Ni-based alloy. These results agreed with previous studies in a laboratory furnace, proving that Al-Fe compounds are less suitable than Al-Ni compounds in a chlorinebearing, oxidizing environment [13]. Nevertheless, the aluminized coating on the stainless steel had a greater resistance to hot corrosion, compared to the uncoated Ni-based alloys (alloy 59 and alloy 625).…”

“…Approaches that are more popular are to use coatings or sacrificial baffles. Aluminide coatings, which form a protective oxide layer of Al 2 O 3 , and chromized coatings (Cr 2 O 3 ), have been found to be effective in minimising high temperature corrosion [11][12][13]. An aluminide coating on cheaper stainless steels may provide engineers with a high corrosion resistance material at an affordable price.…”

Preparation of Ti-Al-Si Gradient Coating Based on Silicon Concentration Gradient and Added-Ce

“…High-temperature diffusion aluminizing of titanium alloys can form a TiAl 3 -rich coating, which can greatly improve its oxidation resistance [9]. The commonly used diffusion method is the hot-dipping method, which was initially applied to steel materials [10] and is often used to improve the corrosion resistance, abrasive resistance and oxidation resistance at high temperature. Studies have found that the hot-dipping method can also improve the performance of titanium alloys [11][12][13].…”

Novel green manufacture of metallic aluminum coatings on carbon steel by sol–gel method

“…The chlorides contained in saline mist deposits directly on metallic parts which are operated at high temperatures, thus resulting in hot corrosion of the metallic parts. 4 The fact is that the deposition of chlorides can easily pass through the iron oxide scale, which is generated spontaneously at high temperature on the metallic parts, to contact the steel substrate. 5 Many studies have indicated that Al 2 O 3 coating has excellent corrosion resistance in chloride-containing environments including Cl 2 –Ar, Cl 2 –O 2 –Ar, HCl–O 2 and NaCl than Cr 2 O 3 due to the highly volatile chromate such as eutectic Na 2 CrO 4 –NaCl or the CrCl 2 O 2 in NaCl-induced hot corrosion.…”