What’s the most misunderstood damage mechanism?

Most people believe that they understand acid corrosion. And they believe that acid corrosion is pretty easy to predict. However, one of the most misunderstood situations is when you have multiple components that can dissolve into water. What you end up with is a solution that does not necessarily model the behavior of the strongest acid in the group.

So, for example, a lot of the people say, “I’ve got hydrochloric acid. I’ve got water. I must have HCL corrosion.” Well, if you also have weak acids and ammonia, and other things that can dissolve into the water, what you end up with is something that’s less aggressive. So if you assign hydrochloric acid, the tables will tell you some amazingly high number for damage, which will not bear out in truth and won’t show up in your inspection record.

How do you model that situation?

You educate the people who are making that decision. And you tell them they’ve got to consider every thing that’s in the system–every thing that’s in the process–before they decide what has materialized.

Want to hear more on this topic? We are opening up the conversation with our Common Reliability Questions video series, in which we discuss processes, best-practices, pitfalls, and opportunities for the future. Join Nathanael Ince, Senior Solutions Director, who has over 10 years of experience building asset integrity and reliability programs for process facilities, and Fred Addington, Principal of Corrosion Technology, who has over 28 years of industry experience and is PinnacleART’s primary corrosion SME. Tune in to receive practical takeaways that will help your facility become more reliable.

 

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