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

Abstract

The aim of this paper is to evaluate the influence of small variations in chemical composition on the corrosion resistance and mechanical properties of low-manganese and medium manganese high strength steels. Six different steels with manganese content varying from 1.5 to 4.0 wt.% and aluminium from 0.008 to 6.5 wt.% were subjected to the analysis. The other subjects for evaluation included the effect of aluminium as a replacement for silicon, niobium microalloying and the effect of heat treatment. The effect of non-metallic inclusions on localized corrosion initiation and propagation was also documented. Using potentiodynamic testing, exposure testing, tensile and impact testing, it was found that the improvement in corrosion resistance associated with increasing aluminium content is accompanied by a significant deterioration of the mechanical properties. Niobium microalloying and heat treatment was found to have no quantifiable impact on the anti-corrosion properties. The effect of aluminium content proved to be superior to the effect of nonmetallic inclusions in terms of determining the overall corrosion resistance of the experimental steels.

Effects of Niobium Addition on the Mechanical Properties and Corrosion Resistance of Microalloyed Steels: A Review

“…Other aspects, such as the grain boundary misorientation and the crystallographic size, can be quantified through the Electron Backscatter Diffraction (EBSD) technique [3,4,11,16,33,34]. On the other hand, when it is required to know the elemental composition, Energy Dispersive Spectroscopy (EDS) or the Optical Emission Spectrometer (OES) are used [2,12,13,18,32,[35][36][37][38][39][40]. Zhang et al [10] evaluated the microstructure of high-strength steels with 0.00 and 0.03 wt.% Nb.…”

Comparative analysis of the corrosion resistance of Bos taurus and Cocos nucifera–reinforced 1170 aluminum alloy in chloride-sulfate solution

“…The presence of protectiveAl 2 O 3 on the peaks of the diffraction graphs for BT particle reinforced matrix composite (Fig.13a) at different diffraction angles coupled with the corrosion resistance enhancement effect of ZnS 2 , CuO 2 and the newly identi ed SiO 2[43][44][45], shows the phases identi ed in Fig.13aenhances the corrosion resistance of BT particle reinforced aluminium matrix composite compared to CN particle reinforced matrix composite. The presence of MnO, FeS and CaCO 3[46][47][48][49]. negatively impacts the corrosion resistance of the CN particle reinforced aluminium matrix composite though the positive in uence of other phases compounds were acknowledged as earlier discussed.…”