随着超声波清洗机的广泛运用，像有些使用超声波清洗机除油的工件，清洗效果反应没有除锈明显，我们要如何检测超声波清洗是否把油清洗干净了呢？今天我们来聊聊，用超声波清洗机除完油后，检测除油清洗效果的方法有哪些。

With the widespread use of ultrasonic cleaning machines, for example, some workpieces that use ultrasonic cleaning machines to remove oil may not have a significant rust removal effect. How do we detect whether ultrasonic cleaning has cleaned the oil thoroughly? Today we will talk about the methods for testing the effectiveness of oil removal and cleaning after using an ultrasonic cleaning machine to remove oil.

检测超声波清洗机表面除油效果，实际上是对表面亲水化程度进行检测，除了科学实验和机理研究的专用仪器测量外，表面除油效果的检测常用的方法有如下几种：

Testing the surface oil removal effect of ultrasonic cleaning machines is actually a test of the degree of surface hydrophilicity. In addition to specialized instruments for scientific experiments and mechanism research, there are several commonly used methods for testing the surface oil removal effect:

1、表面亲水观察

1. Surface hydrophilicity observation

是将经除油后的制件在清水中浸渍后取出，观察水在除油制件表面的停留状态。完全亲水的表面会有一层均匀的水膜，多余的水流下后，表面仍然是完全湿润的。如果有局部除油不好，那里会出现水花或油斑，即水膜会出现一些基本上是圆形的不湿润区域；如果在大部分除油不好，制件基本上表面为不亲水，从清水中取出后表面的水会很快滴下而不湿润。

It is to immerse the degreased parts in clean water and take them out, observing the water's residence on the surface of the degreased parts. A completely hydrophilic surface will have a uniform water film, and even after excess water flows, the surface remains completely moist. If there are local areas where oil removal is not good, water splashes or oil spots will appear, that is, the water film will have some non moist areas that are basically circular; If the oil removal is not good in most parts, the surface of the parts is basically not hydrophilic, and the water on the surface will quickly drip off after being taken out of clean water without getting wet.

2、白色纸巾擦拭

2. Wipe with a white tissue

用白色干净的纸巾对除油后的表面进行揩擦，再看纸巾表面是否留下油污痕迹，如果除油干净的表面，纸巾上只有水渍；而除油不干净的表面，在纸巾上会有油污的痕迹。极薄的油膜是透明的，用肉眼无法看到，但用纸巾揩后，油污被收集到纸巾上而容易显现出来。

Firstly, use a clean white tissue to wipe the degreased surface, and then check if there are any oil stains left on the surface of the tissue. If the degreased surface is clean, there are only water stains on the tissue; On surfaces that are not cleaned by degreasing, there will be oil stains on tissues. The extremely thin oil film is transparent and cannot be seen with the naked eye, but after wiping with a tissue, oil stains are collected on the tissue and easily appear.

3、用达因笔测试

3. Test with a Dyne pen

一般我们都用这种方法测试清洗油污干不干净，因为它比较简单方便，准备好一只达因笔，然后在已除油的工件表面画上一条线条，如果除油干净，工件表面上的线条墨水是不会收缩散开，清洗可见；如果除油不干净，工件表面上的线条会收缩、线条模糊、颜色变浅。

We usually use this method to test whether the cleaning oil stains are dry or not, because it is relatively simple and convenient. First, prepare a dyne pen, and then draw a line on the surface of the degreased workpiece. If the degreasing is clean, the ink on the surface of the workpiece will not shrink or scatter, making cleaning visible; If the oil removal is not clean, the lines on the surface of the workpiece will shrink, become blurry, and the color will become lighter.

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