Skip to main content

Corrosion risk planning - 2 - Above ground storage tanks - oil and gas- PART 1

Image
By

 Above ground storage tanks




1. Inner walls

      • Coating degradation
      • Corrosion due to water/dissolved oxygen
      • insufficient/damaged cathodic protection system
      • dissolved sacrificial anodes
2. Outer walls/roof
      • Atmospheric corrosion
      • coating degradation due to moisture + UV radiation + temperature
      • Erosion and wear due to wind and dust particles
      • biological growth at the bottom areas near soil
      • soil corrosion near the bottom

3. Pipes

      • Atmospheric corrosion
      • Coating degradation
      • mechanical failure
      • internal corrosion due to water/dissolved oxygen
      • crevice corrosion in areas facing away from atmosphere
      • corrosion at welds and joints
      • microbial corrosion at 6 o' clock positions
      • erosion corrosion at bends
4. Railing
      • Coating degradation
      • Wrong coating selection based on pure aesthetics
      • coating damage at joints and bends
      • corrosion at welds in the railing
      • crevice corrosion at fixtures
      • pitting corrosion

5. Breather valve

      • uniform corrosion/pitting depending on whether it is made up of carbon steel/stainless steel
      • Galvanic couple at the joining/welding point of valve to roof
      • corrosion after damage of galvanized layer
6. Spray nozzle
      • Crevice corrosion at orifices
      • clogging
      • erosion and mechanical damage at orifices and bends
      • crevice corrosion at fixtures

7. Manhole

      • corrosion at edges of cover
      • galvanic corrosion at contact points with neighbouring parts
      • pitting due to chloride ion contact
      • crevice corrosion at fixtures
      • pitting corrosion at welds
8. Lagging
      • pitting due to chloride ion contact
      • crevice corrosion at overlapping joints
      • water seepage at insufficiently bonded overlaps

Click here for part 2!

Labels:

Comments

Post a Comment

Welcome to the CORROSPECTIVE BLOG! Scroll along for more posts! Looking forward to your feedback!
P.S. Don't forget to check out the free quizzes!

Popular posts from this blog

Corrosion risk planning - 1 - Lead acid battery

By
Corrosion is a quality, environment, and safety issue. Hence, it has to come under the cope of integrated management system audits However at the moment, it is more or less considered a quality issue. As such, the general tendency is to solve corrosion issues as they come. Especially in new inventions, the foresight to look for potential corrosion risk gets lost in the attempt to focus and highlight the amazing qualities of the said inventions. Hence, I have initiated this series, where I will take a component and point out the potential corrosion and damage risk areas.  Here goes the first one - lead acid battery cell. (Source:https://opentextbc.ca/chemistry/chapter/17-5-batteries-and-fuel-cells/)  Protective casing -  effect of temperature + electrolyte + contamination in electrolyte on the polymer crevice corrosion at fixtures mechanical damage during handling leading to voids for moisture ingress and oxygen/electrolyte leakage Positive terminal - corrosion of the mate...
Post a Comment
Read more

Thesis flowchart...aka...How to decide what to write first in your thesis?

By
It was that moment in my thesis writing when I had received a terrible feedback and was asked to overhaul the entire document. It was time to take a break from the screen and go back to basics. I printed out my document and went home. Then I took a break that evening, because it is one of the most underrated but essential things to get everything into perspective. The next day I proceeded to lay out the pages of my thesis chapter-wise on the table. Then I took a blank paper and pad. I thought, "How will I explain my work to my family members in my native language?" So I decided to write down my work in my native language in the form of an algorithm and then rearrange my thesis. I answered the following questions to do so - What is the issue? Where is it encountered? Is it very common? What makes it so very important? What are the steps that people have already taken to solve it? Why have they not been that effective? What is it that I did to solve the issue? How did I do it? ...
Post a Comment
Read more