Does the poor thermal insulation of saltwater pipelines cause corrosion at multiple points on the pipeline surface?
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Does the poor thermal insulation of saltwater pipelines cause corrosion at multiple points on the pipeline surface? 1. The insulation layer was removed; there is about 80 mm of corrosion on the pipe surface, and it’s not possible to apply clamps ； 2. The rust condition on the pipe surface and the high moisture content – could this be due to issues with insulation quality? 3. What are the reasons for corrosion of pipes when the insulation layer is in place?
Paying attention to the corrosion protection of the metal surface beneath the insulation layer (especially heat preservation) has always been a concern for us. There are also many accidents caused by such problems each year, resulting in significant losses for businesses. However, we can still solve some of the detailed operational issues. This is a great topic; let’s see if anyone has any good suggestions.
Looking at the picture, this area seems to be a point of erosion; you all missed it before. It appears that the insulation and anti-corrosion measures weren’t properly implemented – in areas with good insulation, no moisture can be seen when it’s opened
The quality of the insulation work does not meet the requirements, and the moisture barrier has not been installed properly
Prevent condensation water from contacting the pipe foundation, thereby isolating the water from the pipes. Painting and galvanizing work on the same principle, but their lifespan is short. Long-lasting waterproof coatings are used to create a protective layer with a long service life.
What is this temperature? If the temperature is below 100 degrees, applying that anti-corrosion coating is sufficient; it usually lasts for three years as well
In this situation, provided that the wall thickness of the pipe meets the requirements, sandblasting and painting is the best approach.
Most of them are painted directly without rust removal
I look forward to experts in corrosion prevention coming to discuss this. I’m here to learn*!
Corrosion beneath typical insulation layers: high humidity, sufficient oxygen content, and the presence of salts make it one of the ideal environments for electrochemical corrosion to occur.