Corrosion and stress corrosion cracking initiation of grade 304 and 316 stainless steels in activated Methyl Diethanol Amine (aMDEA) solution

Effect of heat stable acids on corrosion and stress corrosion cracking initiation of 304 and 316 stainless steels in activated methyl diethanol amine (aMDEA) solution

“…No positive hysteresis is seen in the polarisation curve shown in Figure 6. This confirms that pitting corrosion is unlikely for these steels, as reported by other researches [17]. Also, as can be observed from Figure 6, both 304 and 316 stainless steels have been passivated in aMDEA solution containing formic acid.…”

“…Figure 5 and Table 5 show the results of cyclic polarisation tests on grade 304 and 316 stainless steels in 40 wt-% aMDEA solution in the absence of Heat Stable Acids [17]. As can be seen from Figure 5 and Table 5, overall 316 stainless steel has better corrosion performance.…”

“…SCC initiation tests were performed in formic, acetic and oxalic acids in 40 wt-% amine solution at 25°C as schematically shown in Figure 3. Fresh activated methyl diethanol amine (aMDEA) was used as the bulk environment for corrosion and stress corrosion crack initiation tests [17]. The amine solution was diluted by deionised water to reach the concentration of 40 wt-%.…”

Corrosion performance of carbon steel and 304 stainless steel in activated methyldiethanolamine solution using autoclave tests

“…Diethanolamine (DEA), monoethanolamine (MEA) triethanolamine (TEA), 2-amino-2-methyl-1-propanol (AMP) and methyldiethanolamine (MDEA) are widely used to capture CO 2 in gas purification industry. [1][2][3][4] MDEA, as a third type of amine, has the advantages of lower cost, larger absorption capacity, lower degradation tendency and lower energy consumption of regeneration in comparison with firstor second-type amines. 5 However, MDEA is known for its slow kinetics of the CO 2 absorption process.…”

The effect of compressive stress on cavitation-erosion corrosion behavior of 304 stainless steel

“…Although the stress is much lower than the yield stress, it has a great influence on the corrosion behavior of the material (Feng et al, 2016). For the tensile stress, most researchers believed that it aggravated the corrosion process of 304SS by damaging the protective product film (Panahi et al, 2018;Peng et al, 2017). Although for the compressive stress, some studies believed that it alleviated the corrosion of 304SS by retarding crack propagation and improving the stress corrosion resistance (Wei et al, 2018a(Wei et al, , 2018b.…”