The application of potassium hydroxide is very extensive. In addition to our previous articles, it can be used to produce facial cleanser, prepare refractory adhesive, and add it to concrete, it can also be used to produce degreaser. Let's take a look at it in detail.

　　它是常用的除油劑之一，能與硬脂酸皂化動植物油，能產生水溶性硬脂酸鈉和甘油。但是，當濃度較低時，當pH值小于10.5時，硬脂酸鈉會水解，除油效果不是很好。但是，如果濃度過高，硬脂酸鈉和表面活性劑的溶解度會降低，導致可洗性差。雖然氫氧化鉀可以去除油，但油本身不容易去除。因此，一般用量應在100g/L范圍內，且大多數應在50g/L70g/L之間，以達到良好的清洗效果。

　　It can saponify animal and vegetable oil with stearic acid and produce water-soluble sodium stearate and glycerin. However, when the concentration is low and the pH value is less than 10.5, the sodium stearate will hydrolyze and the oil removal effect is not very good. However, if the concentration is too high, the solubility of sodium stearate and surfactant will be reduced, resulting in poor washability. Although potassium hydroxide can remove oil, the oil itself is not easy to remove. Therefore, the general dosage should be in the range of 100g / L, and most of them should be between 50g / L and 70g / L, so as to achieve good cleaning effect.

　　除油液適用于鋼、銅及銅合金、鋁及鋁合金等，除油效果好。但是，在使用時要控制好時間，避免金屬的腐蝕。因為它有很強的腐蝕性，所以在使用時要穿戴防護設備。含油的堿性廢水在排放前需要中和。它也適用于各種活性染料，當應用于各種活性染料時，其結構具有較好的色彩和再現性。

　　The degreasing fluid is suitable for steel, copper and copper alloy, aluminum and aluminum alloy, etc., with good degreasing effect. However, it is necessary to control the time in use to avoid metal corrosion. Because of its strong corrosiveness, it is necessary to wear protective equipment when using. Oily alkaline wastewater needs to be neutralized before being discharged. It is also suitable for all kinds of reactive dyes. When applied to all kinds of reactive dyes, its structure has better color and reproducibility.

　　以上介紹的是氫氧化鉀用作脫脂劑的方法。使用時需要控制用量和時間，避免需要除油的設備被腐蝕。

　　The method of using potassium hydroxide as degreaser is described above. It is necessary to control the dosage and time to avoid the corrosion of the equipment requiring oil removal.