Hycool45 corrosion problem

Hello Colleagues
Has anybody worked with hycool45? If so, had you experienced corrosion problems on your system?
It would be useful to know what pipe materials are you using, how the hycool react with various materials.

Any comment or experience is appreciated.

I have a system using Hycool 20 in a system with copper and abs pipework.

Is this corrosion inside the pipework or outside?

Or, is it erosion on the inside?

Can please explain your problem?