Effect of SO42− and Cl− anionic attack on the localized corrosion resistance and morphology of 409 ferritic stainless steel

The corrosion polarization behaviour and optical characterization of 409 ferritic stainless steel (SS409) in 0.25 M H2SO4 (at specific NaCl concentration), 0.375 M H2SO4 and 0.5 M H2SO4 was evaluated with potentiodynamic polarization technique, open circuit potential measurement and optical mi... Ausführliche Beschreibung

1. Person: Roland Tolulope Loto verfasserin
Quelle: In Results in Physics (01.03.2019)
Weitere Artikel
Format: Online-Artikel
Sprache: English
Veröffentlicht: 2019
Beschreibung: Online-Ressource
Online Zugang: Online
Online
Online
Online
Volltext
Tags: Hinzufügen
Keine Tags. Fügen Sie den ersten Tag hinzu!
  Creative Commons License Source: Directory of Open Access Journals (DOAJ).
LEADER 02638nma a2200277 c 4500
001 DOAJ039795691
003 DE-601
005 20190322110115.0
007 cr uuu---uuuuu
008 190322s2019 000 0 eng d
024 7 |a 10.1016/j.rinp.2018.12.031  |2 doi 
035 |a (DE-599)DOAJ2f772ed784ff45a9868e7193a472e68f 
040 |b ger  |c GBVCP 
041 0 |a eng 
100 0 |a Roland Tolulope Loto  |e verfasserin  |4 aut 
245 1 0 |a Effect of SO42− and Cl− anionic attack on the localized corrosion resistance and morphology of 409 ferritic stainless steel  |h Elektronische Ressource 
300 |a Online-Ressource 
520 |a The corrosion polarization behaviour and optical characterization of 409 ferritic stainless steel (SS409) in 0.25 M H2SO4 (at specific NaCl concentration), 0.375 M H2SO4 and 0.5 M H2SO4 was evaluated with potentiodynamic polarization technique, open circuit potential measurement and optical microscopy characterization. Results showed the SS409 corrosion rate is proportional to the concentration of SO42− and Cl− anions in the electrolyte. At 0.25 M H2SO4, SS409 corroded at a rate of 7.29 mm/y; addition of 0.125% NaCl accelerated the corrosion rate to 16.75 mm/y coupled with a corresponding increase in corrosion current density from 6.71 × 10−4 Acm2 to 3.08 × 10−3 Acm2. Further increase in Cl− anion concentration to 0.75% NaCl increased the corrosion rate to 19.49 mm/y. At 0.25 M H2SO4 the pitting current value is 1 × 10−4 A, this value increased to 1.03 × 10−4 A at 0.25 M H2SO4 (0.125% NaCl) and 8.40 × 10−4 A at 0.25 M H2SO4 (0.5% NaCl). Beyond 0.5% NaCl, passivation behavior was completely absent. Intergranular cracks, large macro-pits and numerous micro-pits were observed for SS409 from 0.25 M H2SO4 (0.75% NaCl) due to Cr depletion and dissolution of inclusions. SS409 from 0.5 M H2SO4 showed the presence of deepened intergranular cracks, shallow pits and a deteriorated surface due to the action of SO42− anions. The morphology of SS409 in 0.25 M H2SO4 + 0.125% NaCl showed slight deterioration in addition to enlarged micro-pits. Keywords: Pitting, Corrosion, Intergranular, Chloride, Anions 
773 0 8 |i In  |t Results in Physics  |g  (01.03.2019)  |w (DE-601)DOAJ00010387X  |x 2211-3797 
856 4 0 |u http://dx.doi.org/10.1016/j.rinp.2018.12.031 
856 4 0 |y DOAJ  |u https://doaj.org/article/2f772ed784ff45a9868e7193a472e68f 
856 4 0 |u http://www.sciencedirect.com/science/article/pii/S2211379718325476 
856 4 0 |u https://doaj.org/toc/2211-3797 
912 |a GBV_DOAJ 
951 |a AR 
952 |j 2019  |b 01  |c 03 

Ähnliche Einträge

Keine ähnlichen Titel gefunden

Privacy Notice Ask a Librarian New Acquisitions