| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive gypsum dissolution liquid capable of dissolving deposited gypsum without causing damage to containers, tools or the like for mixing, application, or processing, the gypsum dissolution liquid solving the problem in which many of the conventional gypsum dissolution liquid agents are alkaline solution whose pH is 8 or more, and pH of some removers is 13 or more, and they are safer for operators than strong acids, decreasing the risk of corroding stainless steel materials, but there is a risk of corroding containers, tools or the like made of non-ferrous metal such as aluminium which is vulnerable to alkali.SOLUTION: The gypsum dissolution agent contains chelating agent, organic acid, alkali agent, and water, and has a pH of 7.5-8.0. |
