CHENG Baogai,LI Baozeng,XIE Meifang,et al.Influence of Sandblasting on Morphology and Adhesion of Water-Borne Film[J].Plating & Finishing,2019,(7):31-35.[doi:10.3969/j.issn.1001-3849.2019.07.007]
喷砂对水性涂装漆膜形貌与性能的影响
- Title:
- Influence of Sandblasting on Morphology and Adhesion of Water-Borne Film
- Keywords:
- water-based coating; sandblasting; adhesion; corrosion resistance
- 文献标志码:
- A
- 摘要:
- 户外服役高压开关漆膜破坏后采用硅烷处理加水性涂料进行现场维修存在附着力不良的现象。本文研究了喷砂前处理+水性涂料在维修过程中的施工工艺，并采用测厚仪、拉拔仪与盐雾试验箱测试其生成膜层的厚度、附着力与耐蚀性能。结果表明，最佳的前处理工艺为喷嘴直径0.6 mm，压力0.5 MPa，距离为600 mm，走枪速度为0.6 m/s，石英砂粒径为80～100目。制备水性涂料涂层，附着力均大于5 MPa，中性盐雾试验1000 h无任何的起泡、剥落、生锈与开裂现象，可以满足生产的技术要求。
- Abstract:
- When the film of high-voltage switch in outdoor service is damaged, adhesion is poor after on-site repair with silane treatment and waterborne paint. In this paper, the construction technology of sand blasting pretreatment and waterborne coatings in maintenance process were studied. Thickness, adhesion and corrosion resistance of the films were tested by thickness gauge, drawing instrument and salt spray test box. The results showed that the optimum pretreatment process was as follows: nozzle diameter of 0.6 mm, pressure of 0.5 MPa, distance of 600 mm, shooting speed of 0.6 m/s and quartz sand with particle size of 80-100 mesh. The adhesion of the prepared waterborne coatings was greater than 5 MPa, there was no foaming, peeling, rusting and cracking after neutral salt spray test for 1000 h, which can meet the technical requirements of production.
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备注/Memo
收稿日期： 2019-01-21；修回日期： 2019-03-05
基金项目： 国家电网有限公司总部科技项目(SGSHDK00SPJS1800621)