Corrosion behaviour of Duplex stainless steels in organic acid aqueous solutions

Invernizzi, A.J.; Sivieri, E.; Trasatti, Stefano P.

doi:10.1016/j.msea.2007.08.036

Cited by 46 publications

(31 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However the corrosion rate in 80 wt.% AcOH + 0.1 wt.% H 2 SO 4 is about one order of magnitude lower than in 1 wt.% H 2 SO 4 . Similar behavior, to a lower extent, was observed with UNS S32750 [20].…”

Section: Corrosion Testing: Weight Loss Resultssupporting

confidence: 75%

“…In addition, in our previous work [20] we proved that just few ppm of metal ions in the higher oxidation state (e.g., Fe 3+ and Cu 2+ ) are sufficient to make UNS S31803 passive in similar solution to those tested in this work. Such metals can be present in process fluids as contaminants, or as corrosion products coming from other parts of the plant.…”

Section: Corrosion Testing: Weight Loss Resultssupporting

confidence: 67%

See 1 more Smart Citation

Corrosion of an UNS S31803 distillation column for acetic acid recovery

Colombo

Trasatti

2015

Engineering Failure Analysis

Self Cite

View full text Add to dashboard Cite

Section: Corrosion Testing: Weight Loss Resultssupporting

confidence: 75%

Section: Corrosion Testing: Weight Loss Resultssupporting

confidence: 67%

Corrosion of an UNS S31803 distillation column for acetic acid recovery

Colombo

Trasatti

2015

Engineering Failure Analysis

Self Cite

View full text Add to dashboard Cite

“…In the present study, enhanced anodic current density was observed in the active to passive transition region at +0.9 V in the acetic acid system. There was a sharp increase in current at about +1.2 V, possibly due to either oxidation of the Cr 3+ in the passive film to Cr 6+ species, or oxygen evolution, or a combination of both in the acetic acid aqueous solutions [44]. Liu et al [45] noticed that the corrosion rate decreased with increasing chromium and molybdenum contents.…”

Section: Anodic Polarizationmentioning

confidence: 99%

Electrochemical studies on the performance of SS316L electrode in electrokinetics

et al. 2009

View full text Add to dashboard Cite

Organic and trace metal pollutants are removed by employing various electrodes in an electrokinetic (EK) process. Stainless steel was used either as an anode or a cathode by various investigators in electroremediation systems. In the present study, the role of SS316L as an anode and cathode in EK system was studied by the measurements of pH, conductivity of electrolyte, and potential of the anode and cathode at different current densities. The weight loss of the anode and cathode and the leaching of chromium, iron, and nickel at different current densities were measured and discussed with an electroosmosis process. The electrochemical behavior of SS316L electrode in neutral, acidic and alkaline pH in soil environment was studied by an electrochemical technique viz. polarization study. Surface analysis of SS316L after EK was done by XPS and SEM. The higher conductivity was noticed at anolyte when compared to catholyte. The weight loss of the anode was in the following order 0.615 > 0.307 > 0.123 mA/cm 2 and the cathode corrosion rate was vice versa. Peroxide production was also noticed at the anolyte, which may encourage the degradation of the total organic content (TOC) in the soil. The OCP (open circuit potential) of SS316L was about +75 mV vs SCE in the soil extract; while adding acetic acid, the potential shifted to the positive side, to about +380 mV vs SCE. The breakdown potential and the range of passivation potential were higher in acetic acid added system when compared to other systems. Pitting was observed on both the anode and cathode within 48 h during the EK process. The present study concludes that SS is not a proper electrode material for the EK process.

show abstract

“…[1] It is expected that the corrosiveness of the acid decreases as the chain length (and hence molar mass) of the organic acid increases. [3] Of all the organic acids, formic acid is hence expected to be the most corrosive. [4] It is further also expected that the corrosiveness of the organic acid will increase with temperature with the acids being the most corrosive near/at the relative boiling point of organic acid.…”

Section: Plant Conditionsmentioning

confidence: 99%

Filler selection for weldments in type 316L stainless steel, for hot organic acid service

Orsmond¹,

Pistorius²

2011

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

The weld metal corrodes much faster than the parent metal, if Type 316L welded with a matching filler is exposed to hot organic acids. Nine commercial filler metals were evaluated by preparing welded coupons, and exposing these to different plant environments (with different organic acid mixtures and temperatures) for several months. The filler metals were chosen to yield different solidification modes, and to vary chromium, molybdenum and nickel contents. Only filler metals which are much more highly alloyed than the parent metal gave lower corrosion rates than the parent metal. Partitioning during and after solidification, and the average alloy content, both affect weld bead corrosion.

show abstract

Corrosion behaviour of Duplex stainless steels in organic acid aqueous solutions

Cited by 46 publications

References 19 publications

Corrosion of an UNS S31803 distillation column for acetic acid recovery

Corrosion of an UNS S31803 distillation column for acetic acid recovery

Electrochemical studies on the performance of SS316L electrode in electrokinetics

Filler selection for weldments in type 316L stainless steel, for hot organic acid service

Contact Info

Product

Resources

About