The fertilizer industry is as complex as any other industry in terms of corrosion. Its corrosion issues begin from the storage area itself. There are four major areas that need to be looked at from the corrosion point of view - Production Storage Transportation Field application In the production stage, there are a few sub-steps. The first step begins with desulphurization. The motive is to remove the sulphur. This sulphur is present in the feedstock, which is the raw material to make the hydrogen for ammonium. The feedstock is petroleum and sulphur is an impurity. Along with this, there may be some produced water as well. This petroleum is stored in tanks made of carbon steel. It is transported to the process through carbon steel pipelines. Carbon steel is said to have less severe corrosion due to elemental sulphur. This corrosion due to elemental sulphur has mechanisms different from sulphidation and hydrogen sulphide corrosion. Watch the video for a detailed explanation Click here f...

How to prepare a corrosion loop? To prepare a corrosion loop, the person in charge will look at the overall picture and answer the following questions - 1. What is the process? 2. What are the components? 3. What are the materials for each component? 4. What are the common features among them? 5. Where does the commonality end? -  This is important as that will mark the beginning of a new corrosion loop. 6. Can I use the same inspection procedure for all of them? 7. Do they corrode/get damaged in the same manner due to the same reasons? WATCH THE VIDEO FOR A DETAILED EXPLANATION -       Read part 1 here! https://corrospective.com/ 😀Happy learning! 😀

Corrosion loop is used to simplify inspection procedures in refining processes. Corrosion loop is defined as a group of components with common materials, processes, and operating parameters.  Source: Rachman, A. and Ratnayake, R.M.C. (2020), "Corrosion loop development of oil and gas piping system based on machine learning and group technology method", Journal of Quality in Maintenance Engineering, Vol. 26 No. 3, pp. 349-368. https://doi.org/10.1108/JQME-07-2018-0058 It is needed when the scenario has - 1. Complex process 2. Several variables such a materials of construction, process parameters, functions 3. Multiple damage mechanisms WATCH THE VIDEO FOR A DETAILED EXPLANATION - Click here for part 2 ! https://corrospective.com/ 😀Happy learning! 😀

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Risk Based Inspection API 580 - API 581 RBI is an often-used word in inspection.  RBI stands for Risk Based Inspection.  RBI tries to answer the following questions - 1. Which part should I expect first?  2. Which part is the most critical? 3. How should I start inspecting it first? 4. Where is the highest risk of failure?  5. Where is the order of risk? PoF is Probability of Failure . This is answered by the following questions - 1. How likely is the failure to occur? 2. How frequently will the failure occur? 3. Is there an approximate time to failure or the number of failures per time? CoF is Consequence of failure Consequence defines how dangerous the failure will be to the resources around it. This implies the following questions - 1. What kind of failure will it be? 2. Will it damage the components? 3. Will it be harmful to human life? 4. Will it affect/contaminate the environment? The risk is calculated as follows - Risk =  PoF x CoF The number designated ...

  !! Can bacteria get adapted to biocides so that every now and then it must be changed? !!    Are non-metals (particularly, composite and plastics) immune to MIC? !!   What is the likely MIC mechanism in soil environments ? Why should I ATTEND?   Microbiologically influenced corrosion (MIC) is a unique type of corrosion with the microbes being the reason for the corrosion to occur, rather than a traditional corrosion cell. MIC is a known issue in many strategic industries such as, but not limited to pipelines, refineries, powerplants, and even PV solar panels. However, MIC is still a significant source of confusion. Hence, it is crucial to get hands-on skills and knowledge to define and cure it more effectively through more realistic prevention/mitigation integrity strategies based on general corrosion technology. What will I learn? “Six important myths currently accepted and used by industry” Electrochemistry in corrosion Relevance of electrochemistry to...

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? ...