An Electrochemical-AFM Study of the Initiation of the Pitting Corrosion of a Martensitic Stainless Steel

Reynaud-Laporte, Isabelle; Vayer, Marylène; Kauffmann, Jean-Pierre; Erre, R.

doi:10.1051/mmm:1997117

Cited by 18 publications

(8 citation statements)

References 18 publications

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“…Further, the high value of surface roughness directly affects and accelerates the corrosion rate by forming a microgalvanic corrosion couple between the pit depth and width. 16,39 Fig. S8 and S9 † shows the 2D prole of the atmospheric corrosion exposed SS pitting information obtained from SEM images.…”

Section: Surface Roughness and Pit Depth Analysismentioning

confidence: 99%

Corrosion behavior of 316L and 304 stainless steels exposed to industrial-marine-urban environment: field study

et al. 2016

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Section: Surface Roughness and Pit Depth Analysismentioning

confidence: 99%

Corrosion behavior of 316L and 304 stainless steels exposed to industrial-marine-urban environment: field study

et al. 2016

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“…In SKPFM, the Volta potential difference (VPD) between a conductive probe (Bruker PFQNE-AL, k = 0.8 N/m, f 0 = 300 kHz) and the surface was quantified by application of a DC bias to null the tip-sample electric force gradient arising from the difference in Volta potential between the probe and sample surface. VPD maps were acquired utilizing frequency modulation SKPFM [31], as described in detail elsewhere [37,38]. These VPD maps were used to predict the corrosion behavior of the samples by suggesting the cathodic and anodic sites and the relative driving force for galvanic corrosion.…”

Section: Methodsmentioning

confidence: 99%

“…Investigation of surface electronic properties can provide information to aid in the prediction of corrosion initiation sites [31]. Recently, scanning Kelvin probe force microscopy (SKPFM) has been used to investigate the role of nano- and micro-scale surface features on corrosion behavior [19,32,33,34,35,36,37,38,39,40,41,42].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Initiation and Propagation on Carburized Martensitic Stainless Steel Surfaces Studied via Advanced Scanning Probe Microscopy

et al. 2019

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Historically, high carbon steels have been used in mechanical applications because their high surface hardness contributes to excellent wear performance. However, in aggressive environments, current bearing steels exhibit insufficient corrosion resistance. Martensitic stainless steels are attractive for bearing applications due to their high corrosion resistance and ability to be surface hardened via carburizing heat treatments. Here three different carburizing heat treatments were applied to UNS S42670: a high-temperature temper (HTT), a low-temperature temper (LTT), and carbo-nitriding (CN). Magnetic force microscopy showed differences in magnetic domains between the matrix and carbides, while scanning Kelvin probe force microscopy (SKPFM) revealed a 90–200 mV Volta potential difference between the two phases. Corrosion progression was monitored on the nanoscale via SKPFM and in situ atomic force microscopy (AFM), revealing different corrosion modes among heat treatments that predicted bulk corrosion behavior in electrochemical testing. HTT outperforms LTT and CN in wear testing and thus is recommended for non-corrosive aerospace applications, whereas CN is recommended for corrosion-prone applications as it exhibits exceptional corrosion resistance. The results reported here support the use of scanning probe microscopy for predicting bulk corrosion behavior by measuring nanoscale surface differences in properties between carbides and the surrounding matrix.

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“…Such inclusions are usually present in martensitic stainless steels and cause pitting. [21][22][23][24]…”

Section: Surface Morphologymentioning

confidence: 99%

Effects of nitric acid passivation on the corrosion behavior of ZG06Cr13Ni4Mo stainless steel in simulated marine atmosphere

Zhang

Wei

Yang

et al. 2020

Materials & Corrosion

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ZG06Cr13Ni4Mo martensitic stainless steel was nitric acid‐passivated to improve its corrosion performance. The effects of nitric acid passivation on the surface morphology, chemical composition, electrochemical properties, semiconductor behavior, and long‐term corrosion performance of the stainless steel were investigated using various analytical techniques. An in‐depth analysis of X‐ray photoelectron spectroscopy (XPS) showed that the passive film formed after the acid passivation process showed high thickness and a duplex character as it consisted of a hydroxide layer and an oxide layer. The oxide layer affected the corrosion resistance and thickness of the passive film. The thickness of the passive film was calculated theoretically as well as experimentally by fitting the electrochemical impedance spectroscopy and XPS results. The electrochemical tests revealed that the dramatic increase in the corrosion resistance of the stainless steel after the passivation was due to the formation of a thick, low‐disorder passive film rather than Cr enrichment. The removal of inclusions resulted in higher pitting resistance, whereas the increased roughness showed a negative effect on the corrosion behavior of the stainless steel. During the wet–dry cyclic tests, the modification of the passive film was examined. The passivated stainless steel exhibited good corrosion resistance for up to 50 days of exposure in the simulated environment.

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An Electrochemical-AFM Study of the Initiation of the Pitting Corrosion of a Martensitic Stainless Steel

Abstract: Abstract. 2014 Pitting corrosion has been studied for more than 5

Cited by 18 publications

References 18 publications

Corrosion behavior of 316L and 304 stainless steels exposed to industrial-marine-urban environment: field study

Corrosion behavior of 316L and 304 stainless steels exposed to industrial-marine-urban environment: field study

Corrosion Initiation and Propagation on Carburized Martensitic Stainless Steel Surfaces Studied via Advanced Scanning Probe Microscopy

Effects of nitric acid passivation on the corrosion behavior of ZG06Cr13Ni4Mo stainless steel in simulated marine atmosphere

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