ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The corrosion resistance of 17-4PH stainless steel obtained by powder injectionmolding (PIM) was investigated in a phosphate buffer solution (PBS) that simulatesphysiological solution and compared with that of 17-4PH steel obtained by conventionalmetallurgy. The corrosion resistance was investigated by electrochemical techniques fordifferent immersion times. The cytotoxicity of both types of 17-4PH steel was alsoinvestigated using a minimum Eagle’s medium (MEM). The MEM solution is a type of cellculture medium, which simulates physiological fluids. The cytotoxicity assay was carried outby neutral red uptake methodology utilizing NCTC L929 cell line from ATCC bank and noneof the steels showed cytotoxic effects. The resulting extracts obtained by immersion of thesteel samples in MEM were analyzed by neutron activation analysis and the results indicatedliberation of chromium and cobalt as corrosion products but in very low amounts. Theelectrochemical evaluation of both steels indicated that they are passive in PBS but presentedsusceptibility to pitting. The 17-4PH PIM steel was slightly more susceptible to pitting thanthat fabricated by conventional metallurgy due to its inherent porosity
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.18.pdf
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