1) erosive mechanism
冲蚀失效机制
2) erosion mechanism
冲蚀机制
1.
A summary was made from three aspects, which are the influence of environment parameters including impact angle, impact velocity, erosion time, and target characters containing hardness, microstructure, fracture toughness on erosion behavior, and the present erosion mechanism.
本文介绍了近年来在陶瓷颗粒增强金属基热喷涂层以及烧结块体材料冲蚀行为方面的研究结果,并从攻角、冲蚀粒子速度、冲蚀时间等环境参数,靶材硬度、显微结构和断裂韧性对冲蚀的影响以及冲蚀机制等三个方面进行评价。
3) failure mechanism
失效机制
1.
STUDY ON THE ELECTROCHEMICAL CORROSION BEHAVIOR OF TiN COATING IN ACID AND SALT SOLUTION Ⅰ.The corrosion resistance and failure mechanism of TiN coating in acid and salt solution;
TiN涂层电化学腐蚀行为研究 Ⅰ.TiN涂层的保护性能与失效机制
2.
STUDY ON THE ELECTROCHEMICAL CORROSION BEHAVIOR OF TiN COATING IN ACID AND SALT SOLUTION Ⅱ.The effect of Al addition on the corrosion resistance and failure mechanism of TiN coating in acid and salt solution;
TiN涂层电化学腐蚀行为研究 Ⅱ.添加Al对TiN涂层保护性能与失效机制的影响
3.
Microstructural Evolving and Failure Mechanism of 3D C/SiC in Environment Simulating Hot-Section Component Service in Aero-Engine;
航空发动机热端部件模拟环境下3D C/SiC的微结构演变和失效机制
4) erosion wear mechanism
冲蚀磨损机制
1.
The erosion wear surfaces of 40Cr and 45# steel were observed on the scanning electron microscope (SEM),it is showed that the erosion wear mechanism of 40Cr and 45# steel is the micro-cutting effect of hard sand on the material surface.
在电子显微镜(SEM)下对40Cr和45#钢冲蚀磨损表面形貌进行观察,分析表明40Cr和45#钢的冲蚀磨损机制都是硬质砂粒对材料表面的微切削作用。
2.
The erosion wear surfaces of QT500 and HT200 were observed on the scanning electron microscope(SEM),it is showed that the erosion wear mechanism of QT500 is the hard sand's micro-cutting effect on the material's surface,and the mechanism of HT200 is the brittlen.
在电子显微镜(SEM)下对QT500和HT200冲蚀磨损表面形貌进行观察,分析表明:QT500的冲蚀磨损机制是硬质砂粒对材料表面的微切削作用,而HT200的冲蚀磨损机制是因赫兹裂纹导致的脆性脱落。
5) corrosion failure
腐蚀失效
1.
Evaluation method for dynamic reliability of offshore platform considering fracture and corrosion failures
考虑断裂和腐蚀失效的海洋平台动态可靠性研究
2.
NiCrBSi alloy welded surfacing coating was prepared on the surface of carbon steel using oxyacetylene flame, and the corrosion failure process of the alloy surfacing coating in 3.
5%NaCl溶液中的腐蚀失效过程。
3.
To survey the situation of corrosion failure about pressure vessels and pipes, more than 400 reports and articles related are collected, which concern petro-chemical industry, chemical industry, petroleum industry.
收集整理近年来有关压力容器管道的腐蚀失效案例,并对其进行了归纳与分析。
补充资料：冲蚀
冲蚀
erosion corrosion
ehongsh-冲蚀(erosion corrosion)金属材料表面与腐蚀流体冲刷的联合作用，而引起材料局部的金属腐性。在发生这种腐蚀时，金属离子或腐蚀产物因受高速腐蚀流体冲刷而离开金属材料表面，使新鲜的金属表面与腐蚀流体直接接触，从而加速了腐蚀过程。若流体中悬浮较硬的固体颗粒，则将加速材料的损坏。一般说来，流体的速度愈高，流体中悬浮的固体颗粒愈多、愈硬，冲刷腐蚀速度愈快。腐蚀介质流动速度又取决于流动方式:层流时，由于流体的粘度，在沿管道截面有一种稳态的速度分布;湍流时，破坏了这种稳态速度分布，这不仅加速了腐蚀剂的供应和腐蚀产物的迁移，而且在流体与金属之间产生切应力，能剥离腐蚀产物，从而加大了冲蚀速度。因此，在管道的拐弯处及流体进入管道或贮罐处容易产生这种破坏。另外，金属表面成膜的特征也可以影响冲蚀速度。硬的、致密的、连续的、粘附性强的膜冲蚀速度小，反之则大。抑制或减少冲蚀的措施是:选择耐蚀性和耐磨性好的材料;改变腐蚀环境如添加缓蚀剂，过滤悬浮固体粒子，降低温度，减小流速和湍流;采用栖牲阳极作阴机保护等。 (1陈树俊l)
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参考词条