Corrosion properties of aluminized 16Mo3 steel

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Journal of Mining and Metallurgy Section B-Metallurgy Pub Date : 2023-01-01 DOI:10.2298/jmmb220927008k

B. Karpe, K. Prijatelj, M. Bizjak, T. Kosec

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Abstract

Chromium-molybdenum steel (16Mo3) is widely used in petroleum, gas, automotive, and construction industries due to its good oxidation resistance and mechanical properties at moderately elevated temperatures. The aim of the research was to evaluate the corrosion susceptibility of 16Mo3 steel in hot rolled and aluminized states. Aluminization was performed by diffusion pack aluminization process at 900?C/2h and 730?C/4h, respectively. Electrochemical corrosion testing included measuring open circuit potential (EOCP), linear polarization resistance (LPR), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) in potassium phosphate buffer (KH2PO4, pH = 7). Optical microscopy (OM), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) have been used for surface layer microstructure characterization before and after corrosion tests. It has been demonstrated that corrosion resistance of aluminized steel is increased substantially. Corrosion properties are related to the structure and properties of intermetallic phase (FeAl, FeAl2 and Fe2Al5) formed on the surface of 16Mo3 steel.

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渗铝16Mo3钢的腐蚀性能

铬钼钢(16Mo3)具有良好的抗氧化性能和中等高温下的机械性能，广泛应用于石油、天然气、汽车和建筑行业。研究了16Mo3钢在热轧和渗铝状态下的腐蚀敏感性。采用900℃的扩散包渗铝工艺进行渗铝。C/2h和730?分别为4 C / h。电化学腐蚀测试包括测量磷酸钾缓冲液(KH2PO4, pH = 7)的开路电位(EOCP)、线性极化电阻(LPR)、动电位极化和电化学阻抗谱(EIS)。腐蚀测试前后采用光学显微镜(OM)、扫描电镜(SEM)和能量色散x射线能谱(EDS)对表层微观结构进行表征。结果表明，渗铝钢的耐蚀性大大提高。腐蚀性能与16Mo3钢表面形成的金属间相(FeAl、FeAl2和Fe2Al5)的结构和性能有关。

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来源期刊

Journal of Mining and Metallurgy Section B-Metallurgy 工程技术-冶金工程

CiteScore

2.00

自引率

40.00%

发文量

审稿时长

2 months

期刊介绍： University of Belgrade, Technical Faculty in Bor, has been publishing the journal called Journal of Mining and Metallurgy since 1965 and in 1997 it was divided in two independent journals dealing with mining and metallurgy separately. Since 2009 Journal of Mining and Metallurgy, Section B: Metallurgy has been accepted in Science Citation Index Expanded. Journal of Mining and Metallurgy, Section B: Metallurgy presents an international medium for the publication of contributions on original research which reflect the new progresses in theory and practice of metallurgy. The Journal covers the latest research in all aspects of metallurgy including hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, solidification, mechanical working, solid state reactions, materials processing, surface treatment and relationships among processing, structure, and properties of materials.