Evaluation of erosion-corrosion resistance in Fe-Mn-Al austenitic steels

Abstract

In this paper, the effects of Mn and Al against corrosion/errosion resistance of three samples of the Fe-Mn-Al austenitic alloys are evaluated. The samples have composition Fe-(4,9 ~ 11,0 wt. (%)) Al-(17,49 ~ 34,3 wt. (%)) Mn-(0,43 ~ 1,25 wt. (%))C, those were prepared in an induction furnace from high purity materials. The alloys were evaluated in a composed solution of NaCl 0,5 M and Silica in a special chamber and AISI 316 stainless steel as reference material. The electrochemical characterization was performed by Tafel curve polarizations technique. This microstructural characterization was by Scanning Electron Microscopy (SEM). It was observed the significant decrease in the corrosion rate for steels Fermanal with a lower percentage of aluminum and manganese under conditions of dynamic corrosion and erosion-corrosion. SEM allows assessment of the dominant damage mechanisms and corroborated the results obtained by electrochemical measurements.

Characterization and Comparative Analysis of Corrosion Resistance of 4 High Manganese Steels Models in Aqueous Solution of NaCl

“…The curve of the 20% manganese steel shows a more noble behavior. By the anodic branch of the polarization curve, it is observed that the process is governed by the transfer of charge, therefore, a generalized corrosion process will occur 14 . The cathodic branch of the curves of these steels suggests that the reaction is controlled by diffusion, which implies the reduction of oxygen reaction 15 .…”

Microstructural and corrosion study of a “non-comercial” high manganese steel

“…The OCP test was performed for 1 h. Potentiodynamic polarization curves were obtained in a potential range from -50 to +300 mV around the OCP. The scanning rate used was 1 mV/s and the measurements ended when 1 mA current was reached [14,15,17,18]. Due to the potential application of this steel in the construction of cryogenic storage tanks that are commonly located on ships or in areas close to the sea, the NaCl solution was chosen for conducting electrochemical tests.…”

“…It is also reported that increasing manganese content above 25%, decreases the corrosion resistance of the alloy in aqueous solutions [13][14][15], as well as adding aluminum to a 25% manganese steel has resulted in increased corrosion resistance in 1M Na2SO4, 50% HNO3 and 10-50% NaOH solutions, but this same steel showed no passivation in 10% HCl and 3.5% NaCl solutions [16]. Finally, it is mentioned that as the manganese content in high manganese steels increases, its corrosion resistance decreases [13][14][15][16][17][18], but the analysis of corrosion in Fe-C-Mn-Si steels is still little reported in the literature, especially for such low carbon values, hence the importance of the current research.…”

Corrosion of a chrome-moly pipe transporting sulfuric acid in a demineralization section: a failure analysis

“…Additionally, poor management occurred where the appropriate research into the applicable material for this application was not undertaken; hence, the repetitive failure reason/origin of the pipeline is self-explanatory. (Aperadora, 2013), inhibitor concentration (if indicated/present): AA = ascorbic acid; b Reported in previous work (Marquez, 2014)…”

“…Several failure studies have been carried out on heat-resistant alloy piping materials used in applications such as, among many others, power plants, preheater tubes of heat recovery boilers and superheaters (Hu, 2012;Bahri, 2017;Hajiannia et al, 2014;Chownanonthapunya and Joipadrit, 2017;Hajri et al, 2015;Dudziak, 2016;Raman and Al-Mazrouee, 2007;Sabouri and Faridi, 2017;Saha and Roy, 2017). In particular, some works, related to corrosion failure analysis in grade pipe steel alloy materials and in other alloys, out of thousands performed, have been reported (Chownanonthapunya and Joipadrit, 2017;Raman and Al-Mazrouee, 2007;Sabouri and Faridi, 2017;Aperadora et al, 2013). On the other hand, basic accelerated corrosion experiments (ACE), in which several alloy samples were exposed to different conditions/ environments to evaluate their performance, were reported in a previous study (Marquez, 2014).…”