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2009-03-17
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干膜厚度的测量 干膜厚度的测量： 在实际工作中大量遇到的是干膜厚度的测量，混凝土测厚仪 数显回弹仪 应变片 护角 在检查涂层各项物理性指标时或统计整个施工完毕后的漆膜总厚度时，均一测干膜厚度为准，这也是业主和建立单位验收工程检测内容之一。 （1）测量的仪器 涂层干膜厚度的测量分为破坏性测试和非破坏性的测试两种方法。中板 二手搅拌车 混凝土外加剂 聚氨酯防水涂料破坏性的测试方法要对涂膜进行划刻等损伤性行为，非破坏性测试方法不会对涂膜造成损害。一般情况下，多数使用的是非破坏性的测量方法，当出现争议或者需要仲裁时大多使用破坏性的测试方法。如：ISO2808-1974漆膜厚度测定标准中的显微镜法，此方法不仅可以测出涂膜的总厚度，丙烯酸防水涂料 心理咨询 配液罐而且可以测出多层结构的涂膜中每层漆膜的厚度。该方法是用一定角度的切割刀具将涂层切出一个V型缺口至底材，然后用带有标尺的显微镜测量。该测厚的方法被推荐为涂膜厚度的仲裁方法。干膜厚度的测量目前已经有不少种仪器和方法，但每种方法都有一定的局限性，提取罐 制药设备 双效浓缩器 三效浓缩器能适用于所有的涂层和环境是极少的。 非破坏性的测量一般采用千分尺法、磁性测厚仪和涡流测厚仪三种方法。真空带式干燥机 真空履带连续干燥机 水分测定仪 定硫仪 其中磁性测厚仪和涡流测厚仪都适用于金属底材表面的防腐层，不过磁性测厚仪适用于磁性的金属底材，而涡流测厚仪适用于非磁性的金属底材表面防腐层的检测（如：铝材、不锈钢等底材）。同时磁性测厚仪和涡流测厚仪都不能适用于混凝土等非金属底材表面的防腐层厚度测量。 （2）测厚仪的校准： 测厚仪在使用前必须校准，无论使用哪种测厚仪，小吃车 多功能小吃车 豆腐机 小吃车如果使用前不校准，测量出来的数据是没有任何意义的。进行校准的时候，在喷砂钢材的表面还是在光滑表面读出的数字的有差别的，在喷砂后的粗糙表面校准后的测厚仪测试出来的涂膜会增加。关于在光滑表面还是在喷砂后粗糙表面校准问题，在很多时候是存在争议的。 ISO2808（第三版）方法10规定：多功能小吃车 豆腐机 小吃车 多功能小吃车 “判断喷砂后钢材表面的干膜厚度，校准应该在光滑钢板表面进行”。同样在SSPC这个标准中，也没有涉及到如何在喷砂后的钢材表面校准的问题，只提到在光滑钢板表面如何校准问题。在许多海洋工程和船舶工业中，涂膜的干膜厚度经常达到300-500μm，甚至更高，监理单位在验收时经常将表面粗糙度忽略了。根据经验，在喷砂涂装表面达到一个实际可行的均匀性涂膜测量，豆腐机 玻璃钢制品 钢格板如果使用磁性原理测厚仪在光滑表面校准后，再次在喷砂表面校准，测得的涂膜厚度要高于在光滑板上校零测出值。高出值得为喷砂表面波峰到波谷值得一半。所以根据经验，涂膜厚度为粗糙度5-6倍时候，可以将粗糙度忽略。其余情况要在原喷砂表面校零。 （3）干膜厚度的测量原则： 业主和监理单位最后要看到是干膜的厚度，超微粉碎机 偏三甲苯 豆腐机 调度机设计院所设计的涂膜厚度也是指干膜的厚度，所以干膜厚度的测量是很必要的。干膜厚度的测量原则主要包括两个方面，即测量点的数量和测量点的厚度。 按照GB50205-2001《钢结构工程施工质量验收规范》第14部分规定，用干膜测厚仪检查，每个构件检测5处，每处的数值为3个相距50min测点涂层干膜厚度的平均值。同时规定按照构件数抽查1%，且不应少于3件。中空玻璃设备 楼梯 维纶水泥电缆管 而ISO2898-97和美国SSPC-PA2关于涂膜厚度测量原则，每10m2测量5个点，每一个点的测量在一个很小面积内测量3个点的平均值，5个测量值的平均值必须符合规定的涂膜范围。 在涂膜厚度测量时，遵守80-20或者90-10的原则。电缆保护管 海泡石电缆管80-20原则的意思为：80%是测量值不得低于规定干膜厚度，其余20%的测量值不能低于0.8x规定膜厚。而对于集装箱、化学品储罐舱及船舶行业来讲，这个原则一般为90-10的。即所有测量点90%测量结果应大于或者等于规定干膜厚度，余下10%的测量结果均应不小于0.9x规定干膜厚度beijing escort beijing escort 百度快照google排名 百度快照 保洁 派克笔 藏獒 气动执行器 气动阀门 气动蝶阀 气动球阀 鼻窦炎治疗 鼻窦炎的治疗 保洁公司 太阳伞 遮阳伞 保健品招商 论文发表 商标 健身器材 pvc运动地板 北京货运公司 空压机 慢性咽炎 慢性咽炎治疗 慢性咽炎的治疗 早泻 早泄的症状 早泄的原因 什么是早泄 阳痿怎么办 失眠 玻璃贴膜 建筑玻璃贴膜 治疗失眠 失眠怎么办 失眠怎么治 治疗抑郁症 治疗抑郁 快速减肥 乳腺囊肿 乳腺痛 乳腺结节 服装批发 注册香港公司 香港注册公司 新疆旅行社 公司注册 注册公司 新疆旅游 新疆旅游网 新疆旅游网 新疆旅游线 路 吐鲁番旅游景点 吐鲁番订房 硬度计 进口气动阀门 进口气动蝶阀 进口气动球阀 气动闸阀 气动截止阀 气动三通球阀 探伤仪 无纺布在线检测 孔洞在线检测 纸病在线检测 测厚仪 英语翻译 俄语翻译 日语翻译 韩语翻译 吐鲁番旅游租车。 | |
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2012-08-01 05:55
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2012-08-01 05:55
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2012-05-10 06:30
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