The characteristics of chromized 1020 steel with electrical discharge machining and Ni electroplating pretreatments

Bai, Ching-Yuan; Lee, Jeou-Long; Wen, Tse-Min; Hou, Kung-Hsu; Wu, Min-Sheng; Ger, Ming-Der

doi:10.1016/j.apsusc.2010.11.070

Cited by 18 publications

(9 citation statements)

References 42 publications

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“…The corrosion rate obtained in this study for bare and coated AISI 1020 is somewhat higher compared to previous reports [7][8][9][10][11][12]. For instance, Bai et al [7,12] showed that the corrosion current of bare steel sample is 6.34 × 10 −4 A/cm 2 while Ni-electroplated pack chromized carbon steel sample shows in the order of 10 −8 A/cm 2 . Similarly, Tsai et al [8] and Chiang et al [9] demonstrated the performance of Ni-electroplated pack chromized AISI 1045 low-carbon steel as BPPs.…”

Section: Corrosion Analysiscontrasting

confidence: 63%

“…The difference in corrosion resistance is due to the difference in the simulated PEM fuel cell environment used for testing the corrosion resistance. The corrosion test was carried out in 0.5 M H 2 SO 4 at room temperature [7][8][9]12] or 0.5 M H 2 SO 4 with 0.07 M Na 2 SO 4 and 2 ppm HF at 50 °C [10]. These test conditions do not simulate the actual PEM fuel cell environment.…”

Section: Corrosion Analysismentioning

confidence: 99%

“…Metals such as titanium [3], copper [4], aluminum [5], stainless steel [6], carbon steel [7][8][9][10][11][12], and various other alloys [13,14] have been evaluated for PEM fuel cell BPPs. Most of these studies conclude that although the cost of manufacturing is low for metallic bipolar plates, the corrosion resistance is also low and hence are not suitable for BPPs.…”

Section: Introductionmentioning

confidence: 99%

“…This method of making BPPs reduces not only the stack's cost of manufacturing but also the volume significantly. The surface modification techniques required for improving the corrosion resistance of these steel bipolar plates are a pack-chromizing [7][8][9]12], and closed field unbalanced magnetron sputter ion plating (CFUMSIP) [10] with Ni coating based pretreatment and electroplating.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Chanda

Padhee

Pathak

et al. 2019

Mater Renew Sustain Energy

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In here, we report on the pulse electrodeposition of nickel-chromium-phosphorous (Ni-Cr-P) coatings on AISI 1020 low carbon steel using an aqueous electrolyte consisting of NiCl 2 , CrCl 3 , and NaH 2 PO 2. We evaluated the effectiveness of Ni-Cr-P coatings for polymer electrolyte membrane fuel cell metallic bipolar plates. Coatings deposited at pH 3.0 and room temperature show nearly three orders improvement in corrosion resistance compared to bare AISI 1020. The corrosion current (I corr) of Ni-Cr-P samples coated at 25 °C is 1.16 × 10 −4 A/cm 2 , while that of bare carbon steel is 1.05 × 10 −2 A/cm 2. The improvement in corrosion resistance is due to the increase in Cr content in the Ni-Cr-P coatings. Cr forms a stable oxide barrier layer and inhibits pitting corrosion. The interfacial contact resistance increases with an increase in Cr content and immersion time in the corrosion media. The increase in interfacial contact resistance is also due to the formation of a stable oxide barrier.

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Section: Corrosion Analysiscontrasting

confidence: 63%

Section: Corrosion Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Chanda

Padhee

Pathak

et al. 2019

Mater Renew Sustain Energy

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“…Additionally, Fe-Cr solid solution, chromium carbides (Cr23C6, Cr7C3 and CrC, etc.) or alloyed cementite ((Cr,Fe)7C3 and (Cr,Fe)23C6) can be formed on the carbon steels after the chromizing treatment [36][37][38][39]. Thereby, the surface layer of the steels becomes more compact due to the entry of large-sized Cr atoms and the formation of chromium compounds.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Microstructure and Properties of Pre-Boronized Coatings During Pack-Cementation Chromizing

Zeng

Yang

et al. 2020

Coatings

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The effect of chromizing time on the microstructure and properties of B-Cr duplex-alloyed coating prepared by a two-step pack-cementation process was investigated. The phases, microstructure, and element distribution of three coatings obtained were characterized by X-ray diffraction (XRD), secondary electron imaging (SEI), backscattering electron imaging (BSEI), and energy dispersive spectroscopy (EDS), respectively. The results show that as the chromizing time increases, the net-like Fe2B and rod-like CrFeB phases in the coating gradually disappear, and finally completely transform into the block-like Cr2B and CrxCy (Cr7C3 and Cr23C6) phases. The growth kinetics analysis shows that interface reaction dominates the coating growth during the early stage of chromizing, while atomic diffusion gradually controls the coating growth at the later stage. The evolution mechanism of the B-Cr duplex-alloyed coating was also discussed.

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Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

2016

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Transition metals nitrides and carbides are used as coatings on bipolar plates for proton exchange membrane fuel cells (PEMFCs) due to their suitable electrical conductivity and corrosion resistance. Chromium electroplated AISI 316L stainless steel bipolar plates were treated by plasma nitriding and solid carburizing to form chromium nitride and chromium carbide, respectively. The presence of CrN/Cr2N and Cr7C3/Cr23C6 was verified by X‐ray diffractometry (XRD) in chromium nitride and chromium carbide coatings, respectively. The corrosion behavior of coatings was investigated by potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy (EIS) in simulated cathode condition. Coated samples showed better corrosion behavior than untreated bare sample. EIS results indicated decrease in corrosion current density after 500 hours, however coatings acted as barrier against solution access to substrate. Corrosion current densities of coatings were close to targets of United Stated department of energy (DOE).

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The characteristics of chromized 1020 steel with electrical discharge machining and Ni electroplating pretreatments

Cited by 18 publications

References 42 publications

Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Evolution of the Microstructure and Properties of Pre-Boronized Coatings During Pack-Cementation Chromizing

Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

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