Construction of anti-corrosion coating renewal on the inner wall of the gasoline tank
Thread Content
1. Damage to the anti-corrosion coating on the inner wall of the storage tank (6 years in use)； 2. Mechanical sandblasting ； 3. Coating after anti-corrosion treatment.
The anti-corrosion treatment is really good!
What kind of paint is used for the anti-corrosion coating on the inner wall?
Why is the inner wall painted this way?
Personal opinions: 1. In terms of corrosion, uniform corrosion accounts for the majority; local corrosion is not apparent, at least it cannot be seen from this diagram. 2. The surface treatment is not clearly visible, especially since the treatment of the welds is not indicated； 3. Judging from the condition of the coating after re-applying it, the surface treatment of the original weld was not good. If possible, from a technical perspective, provide information such as the tank material, the medium contained within, operating conditions (temperature, pressure, etc.), how long it has been in use before corrosion occurred, and the previous anti-corrosion measures taken (information on coating layers), to facilitate analysis and discussion.
Protect the metal surface to prevent further corrosion.
Isn’t there oil inside the tank? Doesn’t oil protect metal?
The contents are assumed to be oil, but may also contain trace amounts of water (in ppm) and sulfur; corrosion can still occur over time. -------------- What is meant by corrosion resistance is essentially the corrosion rate multiplied by a certain number of years; if the resulting value is less than the thickness of the equipment, then the material is considered suitable. However, corrosion may still occur after that period of time...
Some contain corrosive agents that do not protect the metal; they only cause corrosion of the metal.