Increase of Salt Fog Corrosion Resistance of Plasma Nitrided Steel by Pulsed Plasma Post-Oxidation
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 1
Abstract
Abstract: Plasma nitriding has demonstrated to be a good alternative to increase surface hardness, wear and abrasion resistance of AISI 4340 steel. Unfortunately, corrosion resistance of the obtained nitrided layer is poor as a consequence of its high grade of porosity. In the present work, pulsed plasma post-oxidation process is analyzed as an alternative technique to increase corrosion resistance of plasma nitrided AISI 4340. The effect of post-oxidation process duration (15, 30 and 60 minutes) on the corrosion performance of samples when they are exposed to a rich chloride fog under controlled temperature and pressure conditions was evaluated. Results showed that post-oxidized during 15 minutes samples have the best corrosion performance. After 21 h of exposition to 3.5 % NaCl fog, the presence of red rust on post-oxidized during 15 minutes samples was reduced to around 1/16 part of the only nitrided sample. According with scanning electron microscopy and X-ray diffraction analysis, the increase in the corrosion resistance of post-oxidized samples is related to the occurrence of an oxidized thin layer constituted mainly by magnetite kind iron oxide.
Authors and Affiliations
J. C. Díaz-Guillén
Keywords
Related Articles
- EP ID EP114821
- DOI -
- Views 93
- Downloads 0
Managing Business Analysis for Agile Development
Abstract: Agile development methodologies are helping software companies and development teams to align to the newevolving economy. Agile gainsay and hampers our notion of software engineering practices and project...
Design, Control and Prototype Implementation of Maintenance Machine for Trenches
Trenches have a special importance in construction operations as they are widely used in both civil and military engineering. However, maintaining dozens kilometers of trenches that are located in an area of harsh weathe...
Application of Taguchi Parametric Technique for the Decrease in Productivity Loss (In Percentage) In an Industry
Now a day, working in industry is not as comfortable as in earlier times. The man power is decreasing day by day and new recruitment is not in same ratio as the persons leaving industries. This is turn increase the...
Indirect Vector Control of Induction Motor Using Pi Speed Controller and Neural Networks
In this paper, an implementation of intelligent controller for speed control of an induction motor (IM) using indirect vector control method has been developed and analyzed in detail. The indirect vector controlled...
Ultra-Wide Bandpass filter using isosceles triangular microstrip patch resonator
In this paper, Ultra-Wide bandpass filter using isosceles triangular patch resonator (ITPR) is proposed. The reported design has wide bandwidth, low insertion loss, high return loss and flat group delay propert...