有机硅原子氧防护涂层的喷涂工艺  

Spraying process of silicone coating for atomic oxygen protection

作　　者：王凯[1] 徐晓炯[1] 沈一 韦祎[1] 苏宝法[1] 王训春[1] 仇恒抗[1] WANG Kai;XU Xiaojiong;SHEN Yi;WEI Yi;SU Baofa;WANG Xunchun;QIU Hengkang(Shanghai Institute of Space Power Sources,Shanghai 200245,China)

机构地区：[1]上海空间电源研究所,上海200245

出　　处：《电镀与涂饰》2021年第20期1567-1573,共7页Electroplating & Finishing

基　　金：上海市自然科学基金(20ZR1437300);国家自然科学基金(U1937601);国防基础科研项目(JCKY2020203B019);上海市浦江人才计划(2020PJD034)。

摘　　要：以工件表面的涂层分布作为研究对象,对单点喷涂和平面喷涂过程进行微观分析,得出影响空气喷涂过程的工艺变量有喷涂距离、雾化压力、供胶压力、喷枪移动速率和搭接宽度,其中前3个参数决定了喷涂过程的微观基础单元—单点喷涂的质量,而后2个参数决定了涂层的厚度和连续性。试验表明,当喷涂距离为160~180 mm,雾化压力为400~500 kPa,供胶压力为240~400 kPa时,有机硅高聚物溶液的雾化效果较好,具有良好的单点喷涂效果。调整喷枪移动速率为120 mm/s和搭接率为1/2时,获得了厚度一致性较好的合格涂层。分析了喷涂过程中常见缺陷的产生原因,并提出了相应的控制措施,为原子氧防护涂层的喷涂提供参考。The distribution of coating on the surface of a workpiece was studied.The processes of spraying on a single spot and on a plane were analyzed microscopically.The factors affecting the air spraying process were determined as follows:spraying distance,atomization pressure,feeding pressure,spray gun moving speed,and overlap width.The spraying distance,atomization pressure,and feeding pressure determine the quality of single-spot spraying which is the minimum unit during the spraying process.The spray gun moving speed and overlap width determine the thickness and integrity of the coating.The test results showed that the effectiveness of spraying on a single spot was good at spraying distance 160-180 mm,atomization pressure 400-500 kPa,and feeding pressure 240-400 kPa due to the efficient atomization of silicone polymer solution.A good conforming coating with uniform thickness could be obtained by spraying with a spray gun moving speed of 120 mm/s and an overlap ratio of 1/2.The causes of some common defects occurred during the spraying process,and the corresponding control measures were analyzed,providing some advices for preparation of atomic oxygen resistant coatings.

关 键 词：有机硅涂层 原子氧防护 喷涂 雾化 供胶 模型 缺陷 

分 类 号：TQ639[化学工程—精细化工] V255.5[一般工业技术—材料科学与工程]