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Temperature measurement and OES analysis during CPEO on stainless steel.(Report)

Jin, Xiaoyue ; Chen, Lin ; Yu, Jiahao ; Liu, Ruihong ; Xue, Wenbin ; Shang, Hongzhong

Surface & Coatings Technology, April 15, 2019, Vol.363, p.314 [Periódico revisado por pares]

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  • Título:
    Temperature measurement and OES analysis during CPEO on stainless steel.(Report)
  • Autor: Jin, Xiaoyue ; Chen, Lin ; Yu, Jiahao ; Liu, Ruihong ; Xue, Wenbin ; Shang, Hongzhong
  • Assuntos: Temperature Measurement – Analysis ; Temperature Measurement – Measurement ; Activation Energy – Analysis ; Activation Energy – Measurement ; Electrolysis (Chemistry) – Analysis ; Electrolysis (Chemistry) – Measurement ; Stainless Steel – Analysis ; Stainless Steel – Measurement ; Electrolytes – Analysis ; Electrolytes – Measurement ; Polyols – Analysis ; Polyols – Measurement
  • É parte de: Surface & Coatings Technology, April 15, 2019, Vol.363, p.314
  • Descrição: Keywords Cathodic plasma electrolytic oxidation; 304 stainless steel; Optical emission spectroscopy; Plasma electron temperature; Oxidation mechanism Highlights * Characterize microstructure and composition of the CPEO coatings under different voltages * Measure the temperatures and calculate the oxidation activation energy of CPEO * Evaluate the plasma parameters in the discharge envelope on the basis of OES * Investigate the growth and oxidation mechanism of CPEO on 304 stainless steel Abstract In this paper, two-layer structure oxide coatings on 304 stainless steel were fabricated by cathodic plasma electrolytic oxidation (CPEO) in borax and glycerin solution under different voltages. Surface morphology, cross-sectional microstructure and composition distribution were analyzed. The plasma parameters in discharge envelope around the samples were evaluated on basis of optical emission spectroscopy (OES). The temperature close to the surface inside the samples at different voltages is over 1273.15 K. The oxidation activation energy during the CPEO process on 304 stainless steel was 170.5 KJ/mol. In addition, the electron concentration under the voltages was about 9 x 10.sup.21 m.sup.-3--3 x 10.sup.22 m.sup.-3, which increased with increasing the applied voltage. The plasma electron temperature fluctuated between 3000 K--6000 K in the stable discharge stage under different voltages, which increased with the increase of voltage. Furthermore, OES confirmed that O particles in plasma envelope come from the decomposition of borax, glycerin and water in this electrolyte. Author Affiliation: (a) Key Laboratory of Beam technology and Materials Modification of Ministry of Education, Beijing Radiation Center, Beijing 100875, China (b) College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China * Corresponding authors at: Key Laboratory of Beam technology and Materials Modification of Ministry of Education, Beijing Radiation Center, Beijing 100875, China. Article History: Received 30 November 2018; Revised 4 February 2019; Accepted 5 February 2019 Byline: Xiaoyue Jin [xy_jin0824@126.com] (a,b,*), Lin Chen (a,b), Jiahao Yu (a,b), Ruihong Liu (a,b), Wenbin Xue [xuewb@bnu.edu.cn] (a,b,*), Hongzhong Shang (a)
  • Idioma: Inglês

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