Introduction

Corrosion-Resistant Underground Tank for Hypersaline Water Storage at Roy Hill

As part of a new water treatment facility at Roy Hill mine, Aerison Group partnered with Coerco to deliver a durable, corrosion-resistant underground tank system for storing hypersaline concentrate water, supporting operational reliability and environmental responsibility.

Agricultural field at sunset

The Challenge

Storing Hypersaline Water Without Risk of Corrosion or Downtime

Roy Hill’s ultrafiltration and reverse osmosis process created a highly saline concentrate requiring secure underground storage. Aerison needed a solution that could resist long-term corrosion, meet environmental standards, and install efficiently at a remote mining site.

Corrosive Nature of Hypersaline Water

The concentrate water had a salinity level above 40 ppt, posing a serious risk of material degradation and system failure with traditional tank materials.

Need for Durable, Low-Maintenance Storage

Aerison required a robust tank that could withstand chemical exposure over time, reducing the risk of downtime from leaks, damage, or frequent repairs.

Installation and Environmental Constraints

The storage solution needed to be easy to transport, install underground, and have minimal impact on the surrounding environment at the remote Pilbara site.

The Solution

Custom HDPE Underground Tank Engineered for Hypersaline Water

image of Custom HDPE Underground Tank Engineered for Hypersaline Water

Material Selection for Maximum Corrosion Resistance

The tank was constructed using HDPE and super duplex metal, providing optimal durability and performance for long-term exposure to hypersaline water.

Custom Design to Meet Site and System Needs

Coerco worked closely with Aerison to tailor a sump tank that aligned with Roy Hill’s technical, environmental, and logistical requirements.

Reliable Partnership and Technical Expertise

Through expert consultation and design support, Coerco delivered a future-ready tank solution that supports Roy Hill’s commitment to productivity and sustainable mining practices.

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