The influence of active screen plasma nitriding parameters on corrosion behavior of a low-alloy steel

被引：0
|
作者：
Ahangarani, Sh. [1 ]
Sabour, A.R. [2 ]
Mahboubi, F. [3 ]
Shahrabi, T. [2 ]
机构：
[1] Department of Advanced Materials and Renewable Energies, Iranian Research Organization for Science and Technology (IROST), P.O. Box 15815-3538, Tehran, Iran
[2] Department of Materials Engineering, Tarbiat Modarres University, Tehran, Iran
[3] Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
来源：
Journal of Alloys and Compounds | 2009年 / 484卷 / 1-2期
关键词：
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. © 2009 Elsevier B.V. All rights reserved;
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页码：222 / 229
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