-WI-ENG-00 三防漆膜厚测试规范(中英文).docVIP

文件编号 File No 版 本 Rev. 三防漆膜厚测试规范 Coating thickness test specification 生效日期Effective date 页 码 page 修订履历Updated History 序号No. 原内容Updated History 修订后updated 旧版Rev. 修订人updated by 修订日期date 目的purpose: 控制我司产品三防漆涂覆均匀、一致性，达到客户膜厚要求范围，确保产品品质。To control uniformity of coating, meet customer requirements of the thickness of coating, ensure the quality of the products. 范围scope: 本公司使用的自动涂覆工艺。Automatic coating process in our company. 职责Responsibilities 3.1　工程部：技术要求及各项参数的制定；Engineering Department: setting technical requirements and parameters; 3.2　生产部：按涂覆作业文件作业；Production department: operating according to SOP 3.3　品质部：对三防漆涂覆层厚度进行抽检；Quality department: Checking thickness of coating ４.定义：Definition ４.1 三防漆（Conformal coating）：是一种特殊配方的涂料，用于保护线路板及其相关设备免受环境的侵蚀，从而提高并延长它们的使用寿命，确保使用的安全性和可靠性。Conformal coating is a special ingredient of coating, used for protection of circuit board and related equipment against being eroded , so as to improve and prolong their service life, ensuring the safety and reliability. ４.２　磁性测厚法：当测头与覆层接触时，测头与磁性金属基体构成一闭合磁路，由于非磁性覆层的存在，使磁路磁阻发生变化，通过测量其变化量，可测得其覆层的厚度；Magnetic measuring thickness method: when the probe contact the coating, sensors and magnetic metal form a closed magnetic circuit, due to the non magnetic coatings, the magnetic circuit reluctance to change, by measuring the variation can be measured the thickness of coating; ４.３　涡流测厚法：利用高频交变电流线圈中产生一磁场，当测头与金属接触时，金属基体上会产生涡流，并对测头具有反馈作用，通过其反馈作用的大小可测出覆层厚度；Eddy current measuring thickness method: using high frequency alternating current produces a magnetic field in the coil, when the probe in contact with metal, metal will produce eddy current, and has a feedback effect on the measuring head, through the feedback effect can be measured the size of the thickness of coating 5. 内容Content 5.1　测试板准备：Preparing test board: 5.1.1　将标准的测铁板或铝板表面清洁干净，不能有任何杂物；Cleaning the surface steel or aluminu 5.1.２　对清洁好的测试板进行烘烤，去掉水份；Baking the test plate clean 5.1.３　测试板上不能有凹凸不平现象，如有更换测试板。The test board can not be uneven, Replac 5.２　测试仪的