Corrosion mechanism of a new-type low-alloy corrosion resistant steel containing Sb used in acid environment

Abstract

Purpose This study aims to develops a new-type low-alloy corrosion resistant steel containing Sb and investigate the corrosion mechanism of this new-type low-alloy steel. Design/methodology/approach Energy dispersive spectrometer, X-ray photoelectron spectroscopy, X-Ray diffraction and scanning electron microscopy were used to evaluate the corrosion resistance of the rust layers formed on these samples. Laser confocal microscopy was used to observe the corroded surfaces of the steels. Findings Results showed that Sb added can consume H+ in the solution, thereby preventing the oxygen reaction to slow down the corrosion rate. Meanwhile, a stable and insoluble substance (Sb2O3) in the acidic solution would be produced when the reaction of the product of Sb and H+ with the enough dissolved oxygen in the solution. Due to the precipitation of Sb2O3 and iron oxyhydroxides, the rust layer of Sb-containing steel became more uniform and compact, which resulted in better corrosion resistance in acid environment. Originality/value In this study, a new-type acid resistant low-alloy steel containing Sb was developed. Compared with the results, the corrosion mechanism of the new-type low-alloy steel in acid environment was discussed.

Corrosion inhibition of aluminium in hydrochloric acid medium using cimetidine as inhibitor: empirical and optimization studies

“…They are usually recommended for industrial applications because they have satisfactory qualities such as good tensile strength, ease of fabrication and ability to conduct heat and electricity. Detailed understanding of metals is required for effective application of corrosion control measures (Umoren et al , 2016; Anadebe et al , 2019; Yang et al , 2021). As such, consideration of fundamental concept of aluminium as a metal is necessary for the corrosion control study.…”

Synthesis and Structure of Water-Soluble Sb Quantum Dots and Enhanced Corrosion Inhibition Performance and Mechanisms

“…The color changes of the immersion solution before and after immersion are shown in Figure a,b and it shows that the color of 0.5 M H 2 SO 4 solution changes from colorless to dark brown, indicating the formation of iron oxides during immersion for blank Q235 steel; when the solution after immersion is rested for 24 h (Figure c), the dark brown iron oxides subside on the bottom of the bottle, and the supernatant with light green color is observed above these iron oxides, revealing that the Fe 2+ ion is formed in the initial immersion stage and then the Fe 3+ ion is induced through the further oxidation of the Fe 2+ ion. On adding SQDs into 0.5 M H 2 SO 4 solution (Figure d), Sb influences the cathodic processes as follows …”

“…Due to the superior corrosion inhibition performance of Sb and Sb 2 O 3 , in order to effectively enhance the anticorrosion properties of Q235 steel in the corrosive environments, herein, in this work, Sb quantum dots (SQDs) consisting of Sb, Sb 2 O 3 , Sb 2 O 4 , and carbon were successfully fabricated using a simple electrochemical exfoliation method; to the best of our knowledge, there were rarely reports focusing on the corrosion inhibition of SQDs for Q235 steel. The adsorption and corrosion inhibition capability of SQDs was investigated for the first time.…”

Development of a Cr-Ni-Mo alloyed stress corrosion-resistant anchor bolt steel

“…The addition of Sb makes the cathode curve further shift to the left, which verifies the suppression of corrosion behavior by this element. The reactions of Sb forming various oxides are as follows: These oxides are stable oxides insoluble in acid (Yang, 2021), and if covering the electrode surface can inhibit the electrochemical process, due to the low content of Sb, it was not possible to generate sufficient protective film, which failed to have a significant effect in OCP. At –1,200 mV, the simultaneous addition of Sb and Nb did not work, which may be due to the negative effect of Sb on the generation or properties of Nb’s hydrogen traps.…”