Frequently Asked Questions about Waterborne Industrial Paints
Cause 1: The bottom layer is not thoroughly cleaned, for example, the grease or wax on the bottom layer surface is not completely removed. Due to the influence of the interlayer effect, the re-sprayed paint cannot be attached. Reason 2: The interval between secondary spraying is too short, and the primer is not given sufficient drying time, which causes the water in the wet paint surface to erode the primer or topcoat to soften it. Correction: Sand the defective area until it is smooth but not worn through, and repaint.

Sagging Reason 1: Improper use of the spray gun. For example, if the compressed air pressure is too low, or the distance between the spray gun and the spray surface is too close, or the speed of the spray gun is too slow, it will increase the possibility of sagging. 20-25cm, and the moving speed of the spray gun should be uniform. Grasp the limit spray amount that will cause sag, and focus on spraying while observing the film formation. Reason 2: The temperature of the spraying workshop is too low, the sprayed paint layer is not easy to dry or the one-time sprayed paint layer is too thick, resulting in a decrease in the drying speed of the paint layer. Correction method: When the sagging phenomenon is slight, after the surface of the paint film is dry, wet sand the defective area with fine sandpaper.

Yellow rust appears Reason 1: The surface of the coated metal has been severely rusted and the surface is wet. Reason 2: If the surface drying time of the paint is too long, rust spots will appear. Reason 3: The one-time construction coating film is too thick and the surface dries slowly, and rust spots will appear. If the paint is diluted with excessive water and the water volatilizes slowly, rust spots will appear. Correction method: The construction environment temperature is too low or the rainy construction humidity leads to slow drying and flash rust; under various conditions, the paint should not be diluted as much as possible, and the ventilation should be strengthened to keep the air flowing as much as possible to improve the drying speed; Do not apply in rainy days .
水性工業(yè)漆常見(jiàn)問(wèn)題
漆膜隆起 原因一：底層沒(méi)有進(jìn)行徹底地清潔，例如底層表面的油脂或蠟質(zhì)物沒(méi)有徹底清除，由于夾層效應(yīng)的影響，導(dǎo)致再噴涂的涂料無(wú)法附著。原因二：二次噴涂的間隔時(shí)間太短，沒(méi)有給予底層涂料充分的干燥時(shí)間，導(dǎo)致濕漆面中的水侵蝕中涂底漆或面漆使之變軟。修正方法：打磨有缺陷的區(qū)域至平滑但不能磨穿，重新進(jìn)行噴漆。

流掛 原因一：使用不當(dāng)。例如壓縮空氣壓力過(guò)低，或噴槍與噴涂表面距離過(guò)近，或噴槍移動(dòng)的速度過(guò)慢，均會(huì)增加流掛現(xiàn)象出現(xiàn)的可能性，應(yīng)適當(dāng)調(diào)整噴幅形狀和噴涂氣壓，使噴射距離保持在20-25cm，而且的移動(dòng)速度應(yīng)均勻。把握產(chǎn)生流掛的極限噴涂量，集中注意力邊觀察漆膜形成的情況邊噴涂。原因二：噴涂車間溫度過(guò)低，噴涂的漆層不易干燥或一次性噴涂的漆層太厚，導(dǎo)致漆層干燥速度降低。修正方法:流掛現(xiàn)象輕微時(shí)，待漆膜表面干燥后先用細(xì)砂紙濕打磨有缺陷的區(qū)域，流掛現(xiàn)象嚴(yán)重時(shí)，打磨有缺陷的區(qū)域后重新進(jìn)行噴漆。

出現(xiàn)黃色銹 原因一：被涂金屬表面已經(jīng)嚴(yán)重銹蝕且表面潮濕。原因二：涂料表干時(shí)間過(guò)長(zhǎng)也會(huì)出現(xiàn)銹點(diǎn)。原因三：一次性施工涂膜過(guò)厚表干慢也會(huì)出銹點(diǎn)，涂料過(guò)量加水稀釋水份揮發(fā)慢也會(huì)出現(xiàn)銹點(diǎn)。修正方法：施工環(huán)境溫度太低或者陰雨施工濕度大導(dǎo)致干燥慢也會(huì)導(dǎo)致閃銹；各種條件下施工時(shí)涂料盡量不要稀釋，并加強(qiáng)通風(fēng)保持空氣流動(dòng)盡可能的提高干燥速度；不要在雨天施工。www.sisdin88.com