Overhead corrosion remains one of the most persistent challenges in crude distillation — often driven by hydrogen chloride (HCl) formation and the resulting ammonium chloride (NH₄Cl) or amine hydrochloride salts, depending on the neutralizer used.
When NH₄Cl deposits in cooler areas like overhead exchanger tubes, it can lead to plugging, fouling, and – when moisture is present – rapid under-deposit corrosion.
🎯 Why NH₄Cl Sublimation Temperature Matters
Accurately estimating the salt formation (sublimation) temperature of ammonium chloride is key to:
- Preventing salt-related fouling
- Optimizing wash water injection strategies
- Improving exchanger and column temperature control
- Making informed material selection and upgrade decisions
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