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人们对可承受极端环境的高质量涂层的追求是无止境的。此类涂层应用范围广,从食品生产、制药工业设备到海上和电厂等更恶劣环境上都有涉及,使得产品零部件使用寿命延长,停机时间减少,产品组件材料更换的可能性降到最低。通常只有需要同时兼顾几种材料性能,这样才可以创造一种新的材料。这也意味着工业界关注几种涂层处理方法所能提供的涂层性能。本文将针对三种不同的工艺探究其可能性,它们分别是大气等离子喷涂(APS),高速火焰喷涂(HVOF),激光熔覆。选用钴基和镍基涂层材料为研究对象。在一定程度上选用碳化钨,氧化铬及一种封孔涂层进行对照分析。利用标准电化学设备来直接分析不同工艺及相应涂层的腐蚀特性,并进一步利用光学显微镜(LOM)、扫描电子显微镜(SEM)来解释和支撑电化学测试结果。
The quest for quality coatings that can withstand extreme environments is endless. These coatings are used in a wide range of applications ranging from food manufacturing, pharmaceutical industrial equipment to harsh environments such as offshore and power plants, extending the useful life of product components, reducing downtime and minimizing the chances of material changes in the product components . Usually only need to take into account the performance of several materials, so as to create a new material. This also means that the industry is concerned with the coating properties that several coating treatments offer. This article explores the possibilities for three different processes: atmospheric plasma spraying (APS), high velocity flame spraying (HVOF) and laser cladding. Cobalt-based and nickel-based coating materials were selected as the research object. To a certain extent, the choice of tungsten carbide, chromium oxide and a sealing coating for comparative analysis. Standard electrochemical equipment was used to directly analyze the corrosion behavior of different processes and corresponding coatings, and the electrochemical test results were further explained and supported using a light microscope (LOM) and a scanning electron microscope (SEM).