[Q&A Question 300] 2017.11.14
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【Q&A Question 300】November 14, 2017: What is erosion? Answer: When certain parts of a device become corroded, a layer of sulfides or oxides forms on its surface. These corrosion layers have very poor mechanical strength and cannot withstand the impact of high-speed fluids, so they are easily damaged. Once these corrosion layers are destroyed, the surface of the fresh steel is exposed again, making it more susceptible to corrosion. Over time, corrosion in these areas that are prone to impact becomes more severe than in other areas; this condition is known as erosion. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please access it through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)
Also known as scouring. When drilling in collapsed formations, due to improper operation, the drilling fluid pumped into the well moves too rapidly through the annular space, resulting in turbulence that directly erodes the well walls and causes an expansion of the well diameter. The preventive measure is to control the pump flow rate using the Reynolds number, so as to maintain a laminar flow pattern of the fluid returning to the annular space.
It is the result of abrasion, scouring, and etching of the sealed surface caused by the flow of medium. At a certain speed, the floating particles in the medium collide with the sealing surface, causing localized damage to it ； The high-speed flowing medium directly washes against the sealing surface, causing localized damage to it ； During medium mixing and local vaporization, bubbles are generated that strike the surface of the seal, causing localized damage ； The alternating action of abrasive erosion and chemical corrosion will severely erode the sealing surface.
Also known as pitting corrosion. A phenomenon of cavernous corrosion and degradation on the metal surface in contact with the fluid, occurring under conditions of high fluid flow and pressure changes.
Erosion is the combined effect of the surface of a metal material being washed by corrosive fluids, resulting in localized metal corrosion of the material.
Due to the high line speed, severe erosion corrosion occurs at certain specific sections of the pipeline (elbows) as a result of the gas-liquid flow.
Erosion is the combined effect of the surface of a metal material being scrubbed by corrosive fluids, which leads to localized corrosion of the material
A type of wear phenomenon in which the surface is damaged when the material is impacted by small, loose flowing particles
Also known as scouring. When drilling in collapsed formations, due to improper operation, the drilling fluid pumped into the well moves too rapidly through the annular space, resulting in turbulence that directly erodes the well walls and causes an expansion of the well diameter.
Erosive wear refers to a type of wear phenomenon in which the surface of a material is damaged as a result of being impacted by small, loose flowing particles
Erosion is the combined effect of the surface of a metal material being washed by corrosive fluids, resulting in localized metal corrosion of the material.