SSRT条件下におけるMIM法により作製されたSUS304ステンレス鋼の腐食特性  [in Japanese] Corrosion Behavior of Type 304 Stainless Steel Produced by MIM Process under SSRT Condition  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

In this study, the corrosion behavior of MIM (Metal Injection Molding) specimen has been investigated by SSRT (Slow Strain Rate Tensile) test and EIS (Electrochemical Impedance Spectroscopy) method in comparison with I/M (Ingot Metallurgy) specimen. In the SSRT test, the aqueous solution composed of 2.5 kmol·m<SUP>−3</SUP> H<SUB>2</SUB>SO<SUB>4</SUB> and 0.20 kmol·m<SUP>−3</SUP> NaCl (hereafter shortened as SCC solution) in which SCC occurs was used. In addition to this solution, the aqueous solution of 2.5 kmol·m<SUP>−3</SUP> H<SUB>2</SUB>SO<SUB>4</SUB> and 3.0 kmol·m<SUP>−3</SUP> NaCl (hereafter shortened as general corrosion solution) in which general corrosion occurs was used in the EIS test.<BR><I>C</I><SUB>dl</SUB> (Electric Double Layer Capacitance) of I/M specimen has increased abruptly at 7.2 ks during holding in the SCC solution under applied stress, while it has increased gradually without applied stress. On the other hand, the <I>C</I><SUB>dl</SUB> of MIM specimen has increased gradually increased irrespective of with or without applied stress for MIM specimen. The remarkable <I>R</I><SUB>ct</SUB> difference was observed in two cases with or without applied stress in the SCC solution for both I/M and MIM specimen while the slight <I>R</I><SUB>ct</SUB> difference was observed in the general corrosion solution. The fracture surface appearance by SEM showed that the typical transgranular SCC occurred on I/M specimen while the intergranular SCC along grain boundaries occurred on MIM specimen. It was also confirmed that the more significant HE-SCC (Hydrogen Embrittlement) and the weaker APC-SCC (Active Path Corrosion) were observed on the MIM specimen compared with the I/M specimen.

Journal

  • Journal of the Japan Society of Powder and Powder Metallurgy

    Journal of the Japan Society of Powder and Powder Metallurgy 54(5), 336-344, 2007-05-15

    Japan Society of Powder and Powder Metallurgy

References:  19

Codes

  • NII Article ID (NAID)
    10019929947
  • NII NACSIS-CAT ID (NCID)
    AN00222724
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    05328799
  • NDL Article ID
    8837779
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-274
  • Data Source
    CJP  NDL  J-STAGE 
Page Top