FLOW ACCELERATED CORROSION TESTING BASICS

  • Efird K
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Abstract

ABSTRACT
Generally, there are two reasons for conducting flow accelerated corrosion tests. The first is to make a comparison of material performance or corrosion control methods, such as corrosion inhibition under high turbulence conditions. The second is to simulate the flow turbulence in an operating system to investigate the fitness for purpose of either materials of construction or chemical corrosion control methods under the operating conditions experienced. The former is fairly straight forward in that only the generation of high turbulence in the test is required. The second is much more complex in that it requires accurate flow simulation. Definition of the testing criteria is required for a flow accelerated corrosion test to effectively simulate the effect of flow on corrosion in an operating system and is critical to the validity of any flow corrosion test. This paper addresses these considerations as they apply to the most commonly used test methods for flow accelerated corrosion:

1. Recirculating Flow Loops
2. Rotating Cylinder
3. Rotating Cage
4. Jet Impingement

There is no one test that will provide all of the relevant data for every project. The investigator must pick the method or methods that fit the particular situation. The goal here is to provide the information needed to select the appropriate flow accelerated test methodology that will provide the data applicable to a specific project.

INTROD

Author-supplied keywords

  • annular flow
  • flow loops
  • jet impingement
  • rotating cage
  • rotating cylinder

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  • K. D. Efird

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