Hi fellow GT experts,

I work in a power plant running 1 Frame 5 and 1 Frame 6b gas turbine.

We did an offline compressor wash using Fyrewash F3 (Detergent), mixed with demineralized water with ratio of 1:5. The washing solution has a pH of 7.07.

Compressor offline wash was done with both GTs cranking for 5 times. The average pH of Frame 5 was 4.1 and Frame 6b was 5.0, which is a little bit too acidic.

I understand that inside the compressor, there're corrosion of metals, carbons, and etc, which causes acidic effluent after mixing with the washing water.

Is pH 4-5 acceptable? Or mitigation steps should be taken?

Thanks and regards.