• February 9, 2021
    1:00 pm - 4:00 pm
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Bill Amend will Present, Mitigating Corrosion through Effective Design, Materials Selection, and Fabrication on February 9, 2021

This training has the minimum required to hold the class. Further information to be provided upon registration.

There are various options for controlling corrosion, including use of suitable alloys, coatings, chemical treatment, and cathodic protection, or combinations of those methods.  This webinar focuses on combining materials selection with design and fabrication considerations to mitigate corrosion.  The emphasis is on applications in the oil&gas production and pipeline industry, including the advantages and limitations of steel and other commonly used alloys used in those applications.  However, some examples of good and bad practices from everyone’s daily lives are also used to illustrate some of the concepts.  The webinar starts with a discussion of the philosophy of how to select among the various corrosion mitigation options, including strategies and key considerations in materials testing and selection.  Material selection is followed by discussions and case histories of how differences in the details of manufacturing, heat treatment and welding of the selected materials can significantly influence corrosion and cracking resistance of steel and other common alloys.  Finally, various design considerations that are often not adequately considered but which can directly impact long term equipment integrity by either facilitating or mitigating corrosion are described.  Some of those design considerations can impact not only the corrosion resistance of the selected material, but also impact the effectiveness of other corrosion mitigation measures that supplement the inherent corrosion performance of the selected material of construction.

Course notes and Self-Assessment Quiz
Certificate of completion with 3 PDHs

Self -Assessment Quiz

How does stress level affect susceptibility to corrosion?

  1. In most cases, which of these conditions in each pair is likely to result in faster corrosion rates?
    1. Higher temperature v. lower temperature
    2. Clean surfaces v. dirty or scaled surfaces
    3. Downwind v. upwind surfaces
  2. What are three main considerations in estimating the PROBABILITY of a corrosion-related failure?
  3. What material property is the most significant for determining whether a failure will be in the form of a leak versus a rupture for a highly stressed component?
  4. Name one condition that is often overlooked when designing corrosion tests that are meant to replicate or approximate service conditions?
  5. What is the downside or vulnerability associated with selecting a material of construction that relies upon supplemental corrosion prevention methods for successful long term corrosion resistance?
  6. Assume that a welded assembly has a weld metal that exactly matches the base metal composition. Why is the weld zone still the most vulnerable to corrosion?
  7. Assume that a bare metal tank is 8 ft tall and has a liquid level that is normally about 6 ft high. It typically has sludge about 4 inches deep at the bottom.  It has a welded manway and welded nozzles, plus three 1-in diameter sampling ports at various heights that extend outward from the tank and then turn vertically downward where they terminate at ball valves.  Name at least three areas that you would prioritize for corrosion inspection and why.
  8. Assume that a component is expected to reach the end of its service life due to corrosion. Name two things that can be done from a design and maintenance standpoint to reduce the risk of failure.
  9. Name at least three things that need to be considered in selecting condition monitoring methods
  10. You have carefully selected an alloy for a new component. Name four ways that the performance of the alloy can be degraded by shoddy manufacturing or fabrication practices.
  11. What is the relationship between soil resistivity and soil corrosiveness?
  12. A crude oil tank has corrosive water that collects in the bottom. A stainless steel bottom was added and joined to the carbon steel shell.  Name two ways to prevent galvanic corrosion of the shell
  13. Describe four or more things from a design and fabrication perspective that improve the likelihood of getting an effective coating application and performance.
  14. Name two things that could be considered challenges from the perspective of O&M with the use of bolted clamps
  15. Why is internal corrosion often more severe downstream of a tee or a flanged connection?
  16. Incomplete penetration in a girth weld root pass can often lead to what type of corrosion problem?
  17. When applying the galvanic series based on seawater exposure to other environments, what must be remembered?
  18. What is the preferred way of removing heat tint from weld zones that will be subject to corrosive fluids?
  19. What ERW seam features are most likely to cause selective seam corrosion?
  20. What type of weld joint design is most likely to experience fatigue cracking in pump station or compressor station service?
  21. From the standpoint of performance and susceptibility to failure, what is the disadvantage of using high strength steels where H2S or excessively high C.P. potentials are present?

Are there other questions you want to have answered?  Contact us at [email protected] prior to the webinar.

Intructor Bio

Bill Amend
Principal Engineer, DNV GL
Pipeline Integrity, Metallurgical Engineering, Materials Selection, Welding Engineer

Bill Amend has 41 years of experience performing pipeline integrity management, failure analysis, metallurgical engineering, and welding engineering services. His background includes 26 years working for pipeline operators (Unocal and Southern California Gas Co.)  before working for engineering services providers. He is currently Principal Engineer at DNV GL. He is a co-author of the ASME report CRTD Vol. 91 regarding field measurement of hardness to determine the lower bound yield strength of pipe and has managed and conducted various research projects for ASME, DNV GL, NYSEARCH and PRCI addressing the continued development and validation of methods for nondestructive determination of pipe properties, chemical analysis of steel, tensile testing, and characteristics of early vintage pipeline girth welds.  He is a registered professional Metallurgical Engineer in California and graduated from California Polytechnic State University in San Luis Obispo (Cal Poly SLO).



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