Metallurgy and Materials Science quiz

Metallurgy and Materials Science quiz - 1

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What is a Corrosion Loop - PART 1 - CONCEPT

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! 😀

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

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...

Important terms in API certifications - CRV & IOW - II

CRV can be understood by using a simple example of milk kept for boiling in a pot on a stove. The motive, i.e. the reliability of this process has two main factors - 1) The milk should boil. 2) It should remain the vessel and not overflow. There are three critical variables here - Temperature Why is this a critical variable? Answer: The melting point of milk is 92 degrees C. That is the optimum level. If temperature is too low (30 degrees C), the milk may not boil at all. If the temperature is too high (200 degrees C), it may burn quickly. Vessel dimension = volume of milk is 1 ltr Why is this a critical variable? Answer: Vessel volume < 1 ltr, milk will not fit in it in the first at all. Vessel volume = 1 ltr, milk will fit, but will overflow on boiling Vessel volume >1 ltr, milk will fit and not overflow. Time Why is this variable critical? If the other two variable are at the optimum level, then - Too less time (~ 1 min), insufficient for milk to r...

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