---
title: "Ammonium Bisulphide (Sour Water) Corrosion"
slug: "ammonium-bisulphide-sour-water-corrosion"
updated: 2026-10-27T23:12:43Z
published: 2026-10-27T23:12:43Z
canonical: "ims-handbook.cenosco.com/ammonium-bisulphide-sour-water-corrosion"
---

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# Ammonium Bisulphide (Sour Water) Corrosion

## Summary

Aqueous ammonium bisulphide (NH4HS) solutions form when ammonia (NH3) and hydrogen sulphide (H2S) are absorbed in liquid water. Depending on the pH of the resulting aqueous solution, the absorbed H2S may remain as dissolved H2S, or it may dissociate into the bisulphide ion (HS-) or the sulphide ion (S2-). In alkaline sour waters containing dissolved ammonia (typically with pH = 7 to 12), the bisulphide ion is the predominant sulphide species present.

[PDF document](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/CEN.16.10636 - Ammonium Bisulphide (Sour Water) Corrosion.pdf?sv=2026-02-06&spr=https&st=2026-10-28T14%3A25%3A01Z&se=2026-10-28T15%3A25%3A01Z&sr=c&sp=r&sig=zI%2BU%2BSkYjPEp1hgSmx2ICY3GuDTUAAO8vGRNd98QJN0%3D)