Effect of Martensite Morphologies on Corrosion in 5% H2SO4 Solution of Borided X70 Dual Phase Steel

IF 0.6 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Annales De Chimie-science Des Materiaux Pub Date : 2021-02-28 DOI:10.18280/ACSM.450109

Tassi Hocine, Zidelmel Sami, Al-Zuhairi Omar

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引用次数: 2

Abstract

Received: 12 November 2020 Accepted: 9 January 2021 In the present investigation, some electrochemical properties of dual phase X70 steels with different martensite morphologies which have undergone boriding were studied. To obtain a variety of martensite morphologies, Direct Quenching (DQ), Intermediate Quenching (IQ) and Step Quenching (SQ) heat treatments were applied at an intercritical annealing temperature (IAT) of 760°C. The treatment (DQ) allowed the formation of fine martensite evenly distributed in the ferrite matrix. (IQ) treatment showed the formation of martensite along the ferrite / ferrite grain boundaries. In contrast, treatment (SQ) induced the formation of a banded morphology of martensite and ferrite. The realization of borides on X70 (DP) steel was carried out in a powder mixture containing 5% of B4C as source of boron, 5% of NaBF4 as activator and 90% of SiC as diluent at 950°C for a period of time from 4 h. The corrosion behavior of X70 (DP) steel has been explored by the Tafel extrapolation method in a 5 wt. % H2SO4 solution. The corrosion resistance of steel which has undergone boriding (BDP) is higher than that of steel which has not undergone it (DP).

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马氏体形貌对含硼X70双相钢在5% H2SO4溶液中腐蚀的影响

在本研究中，研究了不同马氏体形态的双相X70钢经渗硼处理后的一些电化学性能。为了获得多种马氏体形态，在760℃的临界间退火温度(IAT)下进行直接淬火(DQ)、中间淬火(IQ)和阶梯淬火(SQ)热处理。DQ处理使细小的马氏体均匀分布在铁素体基体中。(IQ)处理显示沿铁素体/铁素体晶界形成马氏体。相反，处理(SQ)诱导马氏体和铁素体形成带状形态。在含5% B4C为硼源，5% NaBF4为活化剂，90% SiC为稀释剂的粉末混合物中，在950℃下，从4小时开始，X70 (DP)钢上实现了硼化物。在5 wt. % H2SO4溶液中，用Tafel外推法研究了X70 (DP)钢的腐蚀行为。经渗硼处理的钢的耐蚀性高于未渗硼处理的钢。

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来源期刊

Annales De Chimie-science Des Materiaux 工程技术-材料科学：综合

CiteScore

1.70

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： The ACSM is concerning the cutting-edge innovations in solid material science. The journal covers a broad spectrum of scientific fields, ranging all the way from metallurgy, semiconductors, solid mineral compounds, organic macromolecular compounds to composite materials. The editorial board encourages the submission of original papers that deal with all aspects of material science, including but not limited to synthesis and processing, property characterization, reactivity and reaction kinetics, evolution in service, and recycling. The papers should provide new insights into solid materials and make a significant original contribution to knowledge.