江苏南通彩钢瓦防腐涂料如何进行耐碱性的检测？

江苏南通彩钢瓦砖防腐涂料因其具有很强的防腐功能而广泛应用于各行各业。因此，与其防腐效果相关的耐酸碱性能是非常重要的，这将直接影响涂层的性能。因此，让我们学习威海彩钢瓷砖防腐层基本电阻测试方法。

一。江苏南通彩钢瓦在（23±2）℃条件下，向0.12g氢氧化钙中加入100ml蒸馏水，制备碱液（饱和氢氧化钙）。溶液的pH值可达12～13。

2。江苏南通彩钢瓦按要求在石棉水泥板上制备板材，在规定的试验条件下干燥7天。取制备好的试板3块，用石蜡和松香的混合物（质量比1:1）将试板边缘和北侧封严，然后将试板面积的2/3浸入（23±2）℃的饱和氢氧化钙溶液中，直至规定时间。

三。浸泡后，取出试板用水冲洗，用滤纸将水滴干燥，观察涂层表面有无起泡、裂纹、剥落、粉化、软化、溶解现象。

四。以两个以上试样的涂层现象作为试验结果，试验板边缘5mm以内、液位以下约10mm的涂层面积不计入评定范围。介绍了防腐涂料耐碱性的测试方法和步骤。这种耐碱性的好坏通常反映在涂膜的耐碱蚀性上。

然后，在规定的条件下，涂层试板浸泡在一定浓度的碱溶液中，不会出现发白、失光、起泡、脱落等现象，说明涂层的耐碱性合格。

NAN tongcolor steel tile anti-corrosion coating is widely used in all walks of life because of its strong anti-corrosion function. Then, the acid resistance and alkali resistance related to its anti-corrosion effect are very important, which will directly affect the performance of the coating. So let's learn about the basic resistance test method of Weihai color steel tile anticorrosive coating. 1. Under the condition of (23 ± 2) ℃, 100 ml distilled water was added to 0.12 g of calcium hydroxide to prepare the alkali solution (saturated calcium hydroxide). The pH value of the solution could reach 12 ~ 13. 2. Prepare the board on the asbestos cement board according to the requirements and dry it for 7 days under the specified test conditions. Take 3 prepared test boards, seal the edges and north sides of the test board with the mixture of paraffin and rosin (mass ratio: 1:1), and then immerse 2 / 3 of the area of the test board in the saturated calcium hydroxide solution with the temperature of (23 ± 2) ℃ until the specified time. 3. After the immersion, take out the test plate and wash it with water, use filter paper to dry the water drops, and observe whether there are blisters, cracks, peeling, pulverization, softening and dissolution on the coating surface. 4. Take the phenomenon of coating of more than two samples as the test result, the coating area within 5mm of the edge of the test plate and about 10 mm below the liquid level shall not be included in the evaluation. The above is the introduction of the test methods and steps for the alkali resistance of anti-corrosion coatings. The quality of this alkali resistance is usually reflected in the resistance of the coating film to alkali etching. Then, under the specified conditions, if the coating test board is immersed in a certain concentration of alkali solution, it will not appear white, lose light, blister, fall off and other phenomena, which means that the alkali resistance of the coating is Qualified.