I just went to the restroom next to the office to wash my hands, and I noticed that the copper valve of the water heater was rusted. Friends, please help analyze this
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This post was last edited by Shutong on 2020-10-23 at 12:34. I just went to the bathroom next to the office to wash my hands, and I noticed that the copper valve of the hot water supply was rusted. Friends, please help analyze this issue: 1. Why is the copper valve of the hot water pipe rusted, while the one on the cold water pipe isn’t? 2. What is the mechanism of corrosion in copper valves? Haichuan Wealth Reward Analyst: victory:
This phenomenon is really rare; I don’t understand it. Let’s take a look at everyone’s opinions.
Valve components； It’s caused by the water quality components! Leaks!
1. It’s probably due to the valve itself or high temperatures, which cause some leakage; moreover, high temperatures facilitate the reaction. 2. Copper + water + oxygen + CO2 react
Everything happens under certain conditions. Corrosion is a complex process. With the same medium and the same pipes, one may not experience corrosion while another does. Think about what the differences between the two are This is how we think about things; many times, it’s about finding the differences and distinctions. In daily operations as well, what was done, what was adjusted, and then what happened? ;P
Under normal circumstances, the sealing points do not leak; if a leak occurs, it will be addressed. In most cases, this occurs because the temperature of hot water pipes changes, and such temperature fluctuations cause some water to condense on the metal surface, leading to corrosion of that surface.
Urine contains ammonia; when ammonia comes into contact with copper, and the escaping hot water dissolves some of the ammonia, the crystals that form upon evaporation continue to cause corrosion
It’s possible that the hot water valve isn’t corroded at all; the leakage is occurring at the threaded part of the hot water connection. Over time, scale can accumulate there due to the hot water, whereas this doesn’t happen with cold water. The problem can be resolved by cleaning the valve and replacing the gaskets.
Chloride ions do not react with copper until 80°C; cold water does not cause corrosion.