Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1621298 | Journal of Alloys and Compounds | 2009 | 8 Pages |
Abstract
This work presents a comparative study of low-alloy steel nitriding for different possible techniques. Active screen plasma nitriding (ASPN) is a successful surface modification method that has many advantages over the conventional DC plasma nitriding (CPN). The corrosion behavior of 30CrNiMo8 low-alloy steel has been examined using anodic polarization tests in 3.5% NaCl solution under varying conditions of ASPN and CPN processes. The process variables included active screen setup parameters, treatment temperature (550 and 580 °C), gas mixture (25/75 and 75/25 of N2/H2) and treatment time (5 and 10 h) in 500 Pa pressure. The structure and phases composition of the compound layer was studied by X-ray diffraction (XRD), microhardness tests, optical microscopy and scanning electron microscopy (SEM). It was observed that ASPN treated samples surface enhanced corrosion resistance while the temperature and/or hole size of screen setup increased.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Sh. Ahangarani, A.R. Sabour, F. Mahboubi, T. Shahrabi,