Greetings gent,
I have question regarding the corrosion inhibitor residual quantity.
If I inject a corrosion inhibitor at the beginning of a long distance piping and I have taken a sample from different locations to get the corrosion inhibitor residual. The resulted was as follows:
|
5 ppm is injected |
Sample point (1)
10 m from the injection system |
Sample point (2)
5m from point (1) |
Sample point (3)
5m from point (2) |
|
Corrosion residual |
4.5 ppm |
3.2ppm |
4.00ppm |
As you can see from the table the corrosion residual is decreased at point 1 and also decrease at point 2 but it is increase at point 3, what do you think the reason of this changing?
why the corrosion residual is increased at point 3?
when we can say that the pipe is not protected?
is there any