Effects of Alloying Elements (Cr, Mn) on Corrosion Properties of the High‐Strength Steel in 3.5% NaCl Solution

Abstract

Effects of chromium and manganese as alloying elements on corrosion resistance of carbon steel were examined using evaluation of corrosion resistance in 60°C NaCl solution with a weight loss test, polarization test, analysis of rust with X-ray diffractometer, Raman spectroscopy, transmission electron microscopy, energy dispersive spectroscopy, and electron energy loss spectroscopy.e weight loss behavior conformed to a typical parabolic law, and the oxidation state of iron in rust was higher along the fast pathway but was disproportionate to the distance from the alloy/AR interface. It suggests that the corrosion process of the alloys was controlled by transport of oxygen to the rust layer. e improvements in corrosion resistance of 18Mn and 18Mn5Cr resulted from both the refinement of grain in adherent rust (AR) and the increase of the amounts of goethite in nonadherent rust (NAR) by chromium and manganese. Especially, the effectiveness of chromium on corrosion resistance was also related to the refinements of grain in AR and the amounts of goethite in NAR. e Tafel extrapolation method was inadequate to measure the instantaneous corrosion rate of steels with various alloying elements and immersion periods because of the difference in electrochemical reduction rates of rust, depending on its constituent.

Comparative assessment and statistical data of admixed rosemary and castor oil on the corrosion inhibition of high carbon and P4 low carbon mold steels

“…Comparing the observations with the results in Tables 3 and 4 for corrosion in HCl solution. It can be seen that the rate of deterioration for P4S is much higher compared to values obtained in Table 1 while the rate of deterioration of HCS is relatively lower compared to Table 2 [23,24]. These differences, despite similar RSCO concentration are due to the Cl À anion content in HCl responsible for corrosion of both steels and the competitive adsorption of the anions and inhibitor cations on the steel surface.…”

Influence of processing conditions on the properties of thermal sprayed coating: a review

“…Kim et al [159] studied the effects of Cr as alloying elements on resistance against corrosion of carbon steel. The resistance against corrosion was examined using various test; weight loss test in NaCl solution at 60°C, polarisation test, XRD, Raman spectroscopy, TEM, SEM/EDS.…”

The Influence of Varying Aluminium and Manganese Content on the Corrosion Resistance and Mechanical Properties of High Strength Steels

“…The ability of Al-Mn steels to form sufficiently compact passive Cr2O3 film surface is arguably very low, since their chromium content is only 0.17 and 0.19 wt Nevertheless, literature reports also different mechanisms of small contents of chr (under 1 wt.%) improving corrosion resistance of steel. Kim et al [40] suggest tha mium hinders the formation of less stable corrosion products of iron (i.e., magne neutral solutions while it also promotes nucleation and growth of more stable g and contributes to it's grain refinement. For the present study, it can be stated t steels with increased chromium content possess higher corrosion resistance.…”