Xia Qijun, Ren Pengwei, Meng Huimin
Corrosion and Protection Center, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing100083, China.
ACS Omega. 2023 Jan 10;8(3):3348-3353. doi: 10.1021/acsomega.2c07073. eCollection 2023 Jan 24.
The purpose of this paper is to investigate the corrosion resistance of different nanoscale microstructures in the same material system and propose a novel method to obtain high-performance materials. During the last 2 decades, microstructure refinement and microalloying have become the main methods to prepare high-performance materials. The tensile strength of nanocrystalline solid solutions can reach 2.3 gigapascal, which is more than 1 fold the strength of traditional steel. However, there are few studies about the corrosion resistance of different nanoscale microstructures. In this paper, coatings with different microstructures (nanocrystalline, amorphous, and amorphous-nanocrystalline composite) have been successfully prepared by electrodeposition in the same material system (nickel-phosphorus alloy). Electrochemical test and high-pressure corrosion immersion test were carried out. The results show that the material loss of amorphous-nanocrystalline coating ( = 9.2 wt %) is about 1/4 that of crystalline coating at 8 MPa. In the range of 0.1 and 8 MPa, the average acceleration effect of hydrostatic pressure on the corrosion rate was calculated to be 1.611 × 10 g·cm·d·MPa.
本文旨在研究同一材料体系中不同纳米级微观结构的耐腐蚀性，并提出一种获得高性能材料的新方法。在过去的20年里，微观结构细化和微合金化已成为制备高性能材料的主要方法。纳米晶固溶体的抗拉强度可达2.3吉帕斯卡，是传统钢材强度的1倍多。然而，关于不同纳米级微观结构的耐腐蚀性研究较少。本文通过电沉积在同一材料体系（镍磷合金）中成功制备了具有不同微观结构（纳米晶、非晶和非晶-纳米晶复合）的涂层。进行了电化学测试和高压腐蚀浸泡试验。结果表明，在8兆帕压力下，非晶-纳米晶涂层的材料损失（=9.2重量%）约为晶态涂层的1/4。在0.1至8兆帕范围内，计算出静水压力对腐蚀速率的平均加速效应为1.611×10克·厘米·天·兆帕。
