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首页> 外文会议>Corrosion conference and expo >Study of High Temperature Oxidation Behavior of Cold Sprayed Novel Ni-20Cr Coating on K21590 Boiler Steel
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Study of High Temperature Oxidation Behavior of Cold Sprayed Novel Ni-20Cr Coating on K21590 Boiler Steel

机译：K21590锅炉钢冷喷涂新型Ni-20Cr涂层的高温氧化行为研究

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The pre-synthesized Ni-20Cr nano-crystalline powder was deposited on K21590 boiler steel by cold-spray process. Nano-crystalline Ni-20Cr powder was synthesized by the investigators using ball milling. The nano-structured coating was developed using cold-spray process with an average coating thickness of 200 μm and microhardness of 600 HV having porosity ＜ 1.5%. The high-temperature oxidation behavior of bare and coated samples was studied under cyclic conditions at 900°C for 50 cycles. The kinetics of oxidation was established using weight change measurements for the bare and the coated boiler steel. Various characterization techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy Energy Dispersive Spectroscopy (SEM/EDS) were used to analyze the oxidation products. The coating was found to offer excellent oxidation resistance and successful in reducing the weight gain of the steel by 71 %.
机译：将预合成的Ni-20Cr纳米晶粉末通过冷喷涂工艺沉积在K21590锅炉钢上。研究人员使用球磨法合成了纳米晶Ni-20Cr粉末。纳米结构涂层是通过冷喷涂工艺开发的，平均涂层厚度为200μm，显微硬度为600 HV，孔隙率＜1.5％。在900°C的循环条件下进行了50次循环，研究了裸露和涂层样品的高温氧化行为。氧化的动力学是通过对裸露的和涂覆的锅炉钢进行重量变化测量来确定的。使用各种表征技术，例如X射线衍射（XRD），扫描电子显微镜能量色散谱（SEM / EDS）来分析氧化产物。发现该涂层具有优异的抗氧化性，并成功地将钢的重量增加降低了71％。

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