What is the normal pH value of antifreeze?

[MacDakota]

Generally, the neutral pH is 7, which is used to slow down consumption and protect metal components. pH indicates acidity or alkalinity, with 7 being neutral, less than 7 being acidic, and greater than 7 being alkaline. The main reason is electrochemical corrosion. Only under specific pH conditions can the corrosion protection effect on metals be better. The principles for selecting antifreeze are as follows: 1. Choose the freezing point of the antifreeze based on the environmental temperature conditions: The freezing point of the antifreeze is one of the most important indicators, determining whether the antifreeze can prevent freezing. Generally, the freezing point of the antifreeze should be selected to be around 10°C to 15°C lower than the lowest winter temperature in the local environment. 2. Choose the antifreeze according to the different requirements of the vehicle: Generally, imported vehicles, domestically produced vehicles, and high-end vehicles should use permanent antifreeze (2 to 3 years), while ordinary vehicles can use direct-use antifreeze, and softened water can be used in summer.