隨著超聲波清洗機的廣泛運用，像有些使用超聲波清洗機除油的工件，清洗效果反應沒有除銹明顯，我們要如何檢測超聲波清洗是否把油清洗干凈了呢？今天我們來聊聊，用超聲波清洗機除完油后，檢測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.

檢測超聲波清洗機表面除油效果，實際上是對表面親水化程度進行檢測，除了科學實驗和機理研究的專用儀器測量外，表面除油效果的檢測常用的方法有如下幾種：

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、表面親水觀察

1. Surface hydrophilicity observation

就是將經(jīng)除油后的制件在清水中浸漬后取出，觀察水在除油制件表面的停留狀態(tài)。完全親水的表面會有一層均勻的水膜，多余的水流下后，表面仍然是完全濕潤的。如果有局部除油不好，那里就會出現(xiàn)水花或油斑，即水膜會出現(xiàn)一些基本上是圓形的不濕潤區(qū)域；如果在大部分除油不好，制件基本上表面為不親水，從清水中取出后表面的水會很快滴下而不濕潤。

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、白色紙巾擦拭

2. Wipe with a white tissue

首先用白色干凈的紙巾對除油后的表面進行揩擦，再看紙巾表面是否留下油污痕跡，如果除油干凈的表面，紙巾上只有水漬；而除油不干凈的表面，在紙巾上會有油污的痕跡。極薄的油膜是透明的，用肉眼無法看到，但用紙巾揩后，油污被收集到紙巾上而容易顯現(xiàn)出來。

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、用達因筆測試

3. Test with a Dyne pen

一般我們都用這種方法測試清洗油污干不干凈，因為它比較簡單方便，首先準備好一只達因筆，然后在已除油的工件表面畫上一條線條，如果除油干凈，工件表面上的線條墨水是不會收縮散開，清洗可見；如果除油不干凈，工件表面上的線條會收縮、線條模糊、顏色變淺。

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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