sludge acid

Questions

What does sludge acid mean?

Impure dark-coloured sulphuric acid that has been used in the refining of petroleum.

How to pronounce sludge acid

1. Open the pronunciation page — Open the Speakur entry for “sludge acid”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “sludge acid”.
4. Repeat and practice — Say “sludge acid” aloud, matching stress and vowels until it feels natural.