SPE Paper Excerpt:

“Identifying the type of corrosion is the first step in the analysis and prevention of corrosion-related failures. Visual inspection of the pit morphology can provide insights into the type of corrosion that is occurring. The complete paper describes in detail how to identify the corrosion mechanism on the basis of the pit morphologies.

Per ppm, dissolved oxygen is far more corrosive than either H2S or CO2.  Difficulty begins at approximately 20 ppb.  In oilfield production, oxygen influence is always combined with dissolved CO2 and/or H2S influence.  Oxygen with appreciable dissolved H2S (20 ppm or greater) gives corrosion pits with the following characteristics:

  1. Relatively smooth sides, broad—can be 1 in. in diameter
  2. Generally trigger at crevices but grow beyond
  3. Usually accompanied by voluminous corrosion-product solids
  4. Must be a source of oxygen entry, sometimes difficult to pinpoint
  5. Often proceeds at a fast rate
  6. Can still occur in presence of corrosion inhibitors if inhibitor is not oxygen-tolerant”

The full report can be found here:  https://www.spe.org/en/ogf/ogf-article-detail/?art=2710

 

EcoVapor Note:

You can reduce your operational risk due to corrosion by placing one of our ZerO2 units on your site.  Remove the oxygen, and remove the risk of corrosion-related costs and failures.

 

By | 2018-08-09T18:03:09+00:00 July 10th, 2018|Education|