Study of methionine as green corrosion inhibitor for TWIP steel in neutral chloride solution

Abstract

The influence of Methionine (MTI) on corrosion behavior of Twinning induced plastic (TWIP) steel in 3.5wt.% NaCl solutions was investigated using electrochemical techniques, scanning electron microscopy (SEM), white light interferometer (WLI) analyses and Raman spectra. With increasing inhibitor concentration, the corrosion inhibition rate first increased and then decreased, and the maximum inhibitor efficiency was found to be 30 mg l−1 MTI. MTI was acting as a mixed-type inhibitor. The inhibition effect of MTI could also be evaluated by SEM and WLI results, and the trend was the same as that obtained by electrochemistry. At the same time, Raman spectra results showed that MTI was adsorbed on the surface of the steel.

Expired flunarizine hydrochloride as corrosion inhibitors for Q235 steel in hydrochloric acid medium: Experimental and computational investigation

“…Based on the electrochemical results, the similar electrochemical behaviors at 298 and 308 K are observed for the corrosion inhibition performance of Q235 steel as incorporation of FH inhibitor; thus, the electrochemical test results of Q235 steel at 298 K are selected to conduct the subsequent characterizations, such as Raman, scanning electron microscopy (SEM), weight loss, adsorption isotherm, surface roughness, and DFT calculations, and the corresponding Raman spectra are displayed in Figure 7, as Q235 steel immersed in 1 M HCl solution without FH inhibitor, the characteristic peaks around 1320, 674, and 550 cm −1 are related to the α‐Fe 2 O 3 , β‐FeOOH, and Fe 3 O 4. 43–45 Furthermore, in the presence of FH inhibitors, the sharp peak of steel at 2329 cm −1 appears in HCl medium, which should be attributed to the uneven corrosion of iron. The existence of these clear peaks confirms the existence of iron oxide, indicating the formation of corrosion products.…”

Synthesis, characterization, and computational study of N‐protected amino acid inhibitors as well as assessment of corrosion resistance properties on mild steel in .5 M H2SO4 solution

“…The effect of methionine as a corrosion inhibitor investigated by Lai et al on twinning induced plastic steel in 3.5 wt.% NaCl solutions. 17 With the increase of inhibitor concentration, the corrosion inhibition rate first increased and then decreased. The maximum inhibition efficiency was about 30 mg/L.…”

“…Phenylalanine shows 89% inhibition efficiency, more than leucine and valine. The effect of methionine as a corrosion inhibitor investigated by Lai et al on twinning induced plastic steel in 3.5 wt.% NaCl solutions 17 . With the increase of inhibitor concentration, the corrosion inhibition rate first increased and then decreased.…”

Alleviation of Iron Corrosion in Chloride Solution by N,N′-bis[2-Methoxynaphthylidene]amino]oxamide as a Corrosion Inhibitor

“…Several investigators have reported [15][16][17][18][19][20][21][22] that organic compounds can act as powerful corrosion inhibitors for numerous metals and alloys in various corrosive media. Particularly, those compounds with polar groups that include N, O, and S and double bonds are excellent corrosion inhibitors.…”

“…Moreover, this adsorption is affected by the number of points such as the charge of the surface of metal, its nature, the mode of adsorption, the structure of the inhibitor, and finally the corrosiveness of the medium [18]. Several compounds with these characteristics have been reported to be efficient corrosion inhibitors for iron in corrosive media; for example, 3-amino-5-mercapto-1,2,4-triazole [1], benzotriazole [2], 5-(3-aminophenyl)-tetrazole [3], 1,1'-thiocarbonyldiimidazole [5], amino acids [7], monoalkyl phosphate esters [19], methionine [21], and cetylpyridinium chloride [22], etc.…”