Since some mud additives have acidic pH and the pH of some mud systems will change, some substances need to be added to increase the pH of the mud system. Many mud additives are acidic.
The three most commonly used pH regulators are sodium hydroxide, potassium hydroxide and calcium hydroxide. The use of sodium hydroxide is much more common, while the other two are often used in specially designed mud systems.
2. Because of potassium ions and calcium ions, both potassium hydroxide and calcium hydroxide have strong inhibitory properties. These two products are generally added to mud to be used as a series of suppression products.
3. Due to the high activity of sodium ions, sodium hydroxide is easy to cause dispersion in bentonite shale.