Influence of Na₂S on the corrosion behavior of Q345 steel in sodium aluminate solution

Molecular dynamics study on dynamic interlayer friction of graphene and its strain effect

“…Since the number of atoms originally near the boundary of the contact region are moved outside of the contact region during tensile deformation of substrate graphene is less than the number of atoms entering the contact region, so the number of effective contact atoms increases. As the compression strain increases, the atoms near the contact boundary enter the contact region, and the number of atoms in the contact region of graphene increases from 1435 to 1672.It suggests that tensile strain decreases friction by reducing the number of atoms in effective contact 50 is inappropriate for the explanation of strain effects on interlayer friction. Although the number of effective contact atoms is a factor affecting the interlayer friction, it is not the dominant factor of the strain effect on nanoscale interfacial friction.…”

Effect of Corrosion Time on the Synergistic Corrosion of Q235 Steel in Sodium Aluminate Solutions

“…Previous to this work, the influence of S 2− and S 2 O 3 2− and the structure of surface corrosion products in sodium aluminate solution on the corrosion behavior of Q235 steel was studied [14,24,45]. In this work, SEM, EDS, XRD, AFM, potentiodynamic polarization curve and EIS were combined with the aim to reveal the effect of corrosion time on the synergistic corrosion of Q235 steel in sodium aluminate solution containing sulfur.…”

Initial Corrosion Behavior of 12Cr1MoV Steel in Thiosulfate-Containing Sodium Aluminate Solution

“…OH − is adsorbed onto the surface of the steel to form FeO, Fe 2 O 3 , and FeOOH easier than other ions in the early stage (Figure 9a,b). Some studies [15,16] have reported that these corrosion products exist after the steel being corroded in sodium aluminate solution. S 2 O 3 2− is adsorbed in the steel and forms SO 4 2− , FeS, and pits on the surface of the steel (Figure 9a,b).…”

“…In addition, acidic solutions promote the formation of the S. Some studies [11][12][13] proposed that the corrosion caused by S 2 O 3 2− occurs only in the presence of a substance that could attack the passivation film or when the passivation film was damaged due to mechanical stress. In addition, there are a few studies on the corrosion behavior of sulfur in the sodium aluminate solution on steel [14][15][16]. Xie et al [14] found that the mechanism of corrosion in S 2− -containing sodium aluminate solutions became similar to active dissolution.…”

“…Xie et al [14] found that the mechanism of corrosion in S 2− -containing sodium aluminate solutions became similar to active dissolution. Through electrochemical corrosion and spray corrosion tests, Fu et al [15] found that the corrosion degree of Q345 steel increased with the increase of sulfide ion concentration. In a solution containing S 2− and S 2 O 3 2− , an increased S 2 O 3 2− concentration led to more significant corrosion of the steel, and a good product film protective matrix was formed on its surface, which has been reported by Quan et al [16].…”