Why does the water storage tank leak after a year? ?
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There is a water storage tank; rubber and plastic are used for insulation, and glue is applied to secure them to the tank. After one year, leaks appeared at the welds. When those welds were ground open and rewelded, it was found that the entire weld area was filled with pores. Could someone please explain why this happened?
Forgot to mention it – the material of the water storage tank is carbon steel
I can’t think of any reason why water would corrode the welds and cause pores; there should be no problems with glue or rubber and plastics either, unless there are already many pores in the storage tank as a result of welding during its manufacturing process.
It must be that the welding quality is too poor; corrosion could occur so rapidly only if there are acids or salts in the water.
Problems caused by low-quality welding rods: Electrochemical corrosion occurs, leading to the formation of pores.
It must have been a welding issue during manufacturing; after a year of corrosion, it’s now leaking
Caused by manufacturing quality issues. Or there are corrosive substances in the water.
I think the considerations are as follows: weld quality, water quality (is it acidic?) ? ) The most important issue is residual stress.
Over time, water quality deteriorates; salt concentrations increase, and corrosion becomes inevitable
It must be a problem with the welding quality! I’ve seen it with my own eyes: in today’s manufacturing industry, sometimes even the containers used are of poor quality. The skill level of welders is also declining steadily, and it’s becoming increasingly rare to find true welding experts these days. Those young workers do their work in a very rough manner, and even when non-destructive testing is carried out, they cheat. In the welding tasks I supervised, 70% of the welds failed the RT testing, yet the final assessment report still rated them as excellent! So, sometimes external factors contribute to the situation experienced by the original poster! Of course, they are still cautious regarding the hazards of important containers!
What kind of water is it? Check its components; it’s related to corrosion... :lol :lol
There are 2 reasons: 1. Water quality issues; 2. Welding quality issues
I think the most likely explanation is that there were many pores in the storage tank after welding during its manufacturing phase, but they weren’t detected at that time.
For welding quality issues, if it’s a corrosion problem, the corrosion doesn’t occur only in the weld area
For carbon steel welding, even with a skilled welder, there shouldn’t be so many pores in the weld… It’s not stainless steel anyway. What’s the quality of the water like?
Some private companies do indeed operate in this way these days. If the quality is poor, problems will arise, and then money has to be spent to fix those issues. They just don’t bother to improve the quality; everything is fake – those so-called quality certificates and inspection reports are all false. In the end, there are still problems. So one must be careful when choosing a manufacturer
When discussing, people often rely on past experience to draw conclusions! I need to make it clear that when engaging in technical discussions, one should use imagination based on scientific principles! 1. When raising questions for consultation & discussion, we need sufficient information about the current situation: a: What is the height of the liquid stored? b: What are the storage conditions for the liquid inside? c: What kind of water people are concerned about matters; the effects of pure water, tap water, etc. vary. 2. What I want to suggest is to upload as many diagrams and process parameters as possible, so that everyone can understand; otherwise, it’s just………which actually isn’t of any real help to you. 3. The degree of corrosion, the area affected, the locations where welds are present………there are too many things that aren’t clear! Most of the people on this forum are technical professionals; let’s help each other as much as possible!
It’s related to the weld; it’s likely that the welding electrode is not compatible with the base material of the tank.
We have a leak in the methanol storage tank here; it’s because the foundation wasn’t properly constructed
Agree with what was said on floor 10! The internal cause is manufacturing defects, while the external cause is medium corrosion; without medium corrosion, there definitely would be no leakage. . . .