Microstructures and electrochemical behaviors of as‐cast magnesium alloys with enhanced compressive strengths and corrosion decomposition,Materials and Corrosion

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Microstructures and electrochemical behaviors of as‐cast magnesium alloys with enhanced compressive strengths and corrosion decomposition
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-07-27 , DOI: 10.1002/maco.202011865
Xuewu Li _{1,

2,

3,

4} , Tian Shi ₁ , Ben Li ₅ , Xuegang Zhou ₁ , Chuanwei Zhang ₁ , Zhenyan He ₁ , Binbin Zhang ₆ , Qiaoxin Zhang ₅

Affiliation

Rapidly disintegrating alloys with enhanced compressive strengths and corrosion rates are prepared for fracturing parts in petroleum extraction. Extrusion casting is used to prepare Mg–xZn–Zr alloys by adjusting zinc content. Mechanical and electrochemical behaviors are investigated to evaluate the practicability as decomposable materials. Superficial topographies, compositions, phases, and distributions are also characterized to determine the dissociative mechanism. The results make clear that matrixes and secondary structures with reticulate shapes arise on surfaces. The material also possesses enhanced compressive strength to guarantee stabilization and pressure‐holding ability among decomposition. Concurrently, with the increase of zinc content and decomposition time, galvanic corrosion aggravates resulting in gradually reduced corrosion potentials and accelerated decomposition rates. Rapid material dissolution mainly attributes to anode corrosion of matrixes, peeling of microparticles, and inferior tolerance of corrosive products to dissolution. Such work highlights potential applications of fracturing materials for ensuring rapid decomposition and guaranteeing stable stress tolerance.

中文翻译：

具有增强的抗压强度和腐蚀分解性能的铸态镁合金的组织和电化学行为

制备具有更高抗压强度和腐蚀速率的快速崩解合金，用于压裂石油开采中的零件。挤压铸造用于制备Mg– x通过调节锌含量的Zn-Zr合金。研究了机械和电化学行为，以评估可分解材料的实用性。表面形貌，组成，相和分布也被表征以确定解离机理。结果清楚地表明，在表面上出现了具有网状形状的基体和二级结构。该材料还具有增强的抗压强度，以确保分解过程中的稳定性和保压能力。同时，随着锌含量和分解时间的增加，电化腐蚀加剧，导致腐蚀电位逐渐降低，分解速率加快。材料的快速溶解主要归因于基质的阳极腐蚀，微粒的剥离，腐蚀性产品的溶解性较差。这项工作突出了压裂材料在确保快速分解和保证稳定的耐应力性方面的潜在应用。

更新日期：2020-07-27

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