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You can see a buildup of tubercles here and here.
You see they are soft underneath;
they are porous.
So you have under deposit corrosion.
So this is all corrosion byproduct that I'm scraping away. away
"You hear the popping when you push on them."
Hear all that pop?
"Push on it there."
See all that?
See how all that's black right there?
Down to the base metal?
What you have is, you actually have under deposit microbial
influenced corrosion.
So you've got bacteria that are just basically eating away
at your tube sheet.
That's what all this is right here. "Green..."
See how that just all comes right off? Up here,
same thing.
See how you have pockets; it's like a bubble?
"Do the other one too."
Here as well.
Now this is the middle chiller, so I'm assuming it
does not run as much as the ends.
This chiller looks worse than the first one.