Selection of material for cooling water pipelines
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I was working on a project recently, and a colleague suggested that carbon steel pipes are more resistant to corrosion for use in the dirty loop cooling water and clean loop cooling water compared to stainless steel pipes. I’m not entirely sure about this, so I’d like to ask if there is any basis to such an claim? By researching on my own, I found that cooling water causes pitting corrosion in stainless steel, while it leads to uniform corrosion in carbon steel. Which of these two types is more unacceptable? I hope experienced seniors can give some advice.
We first need to understand the situation of your unit’s circulating water system and its quality; any key components that need upgrading should be upgraded, such as the core of the heat exchanger
What do your turbid ring and clear ring mean? Is your cooling water industrial circulating water? What is your process equipment? What is a medium?
It is usually a leak in the return water pipe. It is related to temperature and water hammer; both carbon steel and stainless steel can suffer from pitting corrosion. As for the reason why stainless steel is less resistant to corrosion than carbon steel, I’m not quite sure.
I don’t understand – what are point corrosion and uniform corrosion? Logically, stainless steel should be more resistant to corrosion.