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

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

3 steps to begin experiments...aka...I am lost in this lab!

By
  All the students in the first few days of research are faced with the dilemma of the right time and way to begin experimentation. There are as many ways and thought processes to do so as there are people. I will share my learnings here. The problem is that the literature review tends to become so vast that it is difficult to decide what the exact problem is. 1. The best way is to NOT WAIT for the literature review to get over. Begin with the experiments simultaneously. Gain experience on as many new techniques as possible. 2. Start with that research paper which will most likely form the basis of your work. Attempt to reproduce the experiments in the paper. Try to see what other experiments can corroborate those results. 3. Select the correct research papers to continue the literature review. P.S. All the experiments should have a reason for doing them. You should be able to answer the question 'Why should I do this experiment? What will I learn?'
Post a Comment
Read more

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

By
 Above ground storage tanks - PART 2 9.      Splash plate corrosion at welds atmospheric corrosion coating damage, if applicable pitting due to chloride salt deposition in marine environment 10.      Spiral staircase corrosion at welds of individual bars and critical joints to the tank coating damage and delamination cracks near welds uniform corrosion at exposed surface near delamination galvanic corrosion near weld/staircase/tank interface due to dissimilar alloys 11.      Manometer corrosion of screws, nuts, and bolts used for attachment possible moisture penetration in case of cracks due to improper handling 12.      Manhole Internal corrosion due to water either as a moisture or as storage product External coating damage due to moisture penetration, dust, rainfall, UV radiation Coating damage at fixtures and edges galvanic corrosion at nuts and bolts due to dissimilar alloys atmospheric corrosion at area where coating...
Post a Comment
Read more