分析彩涂钢板常见的质量问题

一。彩钢板耐溶剂性差
特点：丁酮擦去少许油漆。
原因：1。烘烤温度不符合要求。2。涂料的固化是有问题的。三。前处理清洗不干净。
二。 彩钢板漏涂
特点：未上漆的面漆。
原因：1。边缘光洁度不涂，底板不好或涂辊与大后辊间压力不足。2。板表面的内部光洁度没有涂层。底漆冷却后，板面有水或其它异物。
三、 彩钢板弯曲不良（T弯 
特点：钢材180度弯曲试验时，加工部位出现裂纹和涂层剥落。
原因：1。过度掌握预处理。2。涂层厚度太厚。三。过度烘烤。4。底涂涂料与涂料生产厂家不同，或使用稀释剂不当。 
四。 彩钢板硬度差（铅笔硬度）
特点：画笔用于涂膜表面硬刮，涂擦后在表面留下划痕。
原因：1。炉温低，涂层固化不充分。2。加热条件不当。三。涂层的厚度比规定的厚度厚。
这就是彩涂钢板常见的质量问题的介绍

One. Poor solvent resistance of color steel plate

Features: Butanone wipes off a little paint.
Resons: 1. The baking temperature does not meet the requirements. 2. The curing of coatings is problematic. Three. The pretreatment is not clean.
Two. Leakage coating of coloured steel plate
Characteristics: Unpainted topcoat.
Reason: 1. The edge finish is not coated, the bottom plate is not good or the pressure between the coated roll and the rear roll is insufficient. 2. There is no coating on the inner surface of the plate. After the primer is cooled, there is water or other foreign matter on the surface of the board.
3. Poor bending of coloured steel plate (T-bending)
Characteristic: Cracks and coating peeling occur at the processing site during 180 degree bending test of steel.
Reasons: 1. Excessive mastery of pretreatment. 2. The coating is too thick. Three. Overbaking. 4. Primer coatings are different from paint manufacturers or improper use of diluents.
Four. Poor hardness of coloured steel plate (pencil hardness)
Features: Brushes are used for hard scraping on the surface of coatings, leaving scratches on the surface after scratching.
Reasons: 1. Low furnace temperature, insufficient curing of coating. 2. Improper heating conditions. Three. The thickness of the coating is thicker than the specified thickness.
This is the introduction of common quality problems of color coated steel plate.