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中间漆和面漆涂装的施工要点包括施工条件和施工方法

发布时间:2015-8-29 9:13:47 浏览次数:586




1)施工条件。①施工场地要求。现在有些施工单位在涂装时,涂装区露天作业,受大气环境影响,无法做到清洁和干燥,已经除锈的涂件表面和涂装好的表面被灰尘、喷砂飞扬的沙粒、雨水、油脂、焊接飞溅或其他脏物附着在上面,影响漆膜质量。从构件周期寿命和价值工程角度考虑,除锈和涂装应当在封闭车间内进行,以保护过程质量。②施工环境温度一般要求在5~38℃,温度过低涂料中的固化反应停止,过高则需要大量使用稀释剂,影响漆膜质量。现场应设置温度计,按照厂家提供的产品使用指南规定的温度条件操作。③要特别注意相对湿度应<85%,钢材温度高于露点温度,以防止基层和前道涂层有结露现象。涂装后4h内不得淋雨,防止水分存留加剧电化学反应。

 

2)施工方法。高压无气喷涂方式具有功率高、涂料损失少、一次涂层厚的优点,应当尽量选用。施工时按照自上而下、先里后外、先难后易、纵横交错的方式进行涂装。传统的滚涂、涂刷与之相比,工艺落后,质量控制难度大,应减少使用。


1) the construction conditions. (1) construction site requirements. Now some construction units in the coating, the coating area open operation, affected by the atmospheric environment, cannot clean, dry and has been well cleaning on the surface of the coating and coating was flying dust, sand the surface of the grains of sand, water, grease, weld spatter or other dirt adhere to the above, affect the quality of paint film. Think in terms of cycle of life and value engineering, derusting and painting shall be carried out within the closed workshop, in order to protect the process quality. (2) the construction of the general requirements in 5 ~ 38 ℃ environment temperature, low temperature coating of the curing reaction stops, too high requires extensive use of diluent, affect the quality of paint film. Site should set the thermometer, according to the manufacturer to provide the product using the guidelines operating temperature conditions. (3) it is important to pay special attention to the relative humidity should be < 85%, steel temperature above the dew point temperature, in order to prevent the grassroots and dewing phenomenon before coating. Within 4 h after coating must not get wet in the rain, prevent moisture kept adding electrochemical reaction.

2) construction method. High-pressure airless spraying method has high power, the advantages of less paint loss, a thick coating, should choose as far as possible. Construction according to the top-down, outside, after the first difficult before they are easy, crisscrossed process for coating. The traditional roller coating, coating, by contrast, backward technology, quality control is difficult, should reduce use.


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