Five Practical Ways to Help Prevent Corrosion

Corrosion within water systems is a common problem that can lead to reduced efficiency, equipment damage, and ultimately system failure. While it’s almost impossible to eliminate corrosion entirely — due to natural chemical reactions between pipework, water, and the surrounding environment — there are effective steps that can significantly reduce its impact.

Corrosion occurs when a pipe’s surface begins to deteriorate. One of the most common forms is metal corrosion, where iron reacts with oxygen and water to form iron oxide (rust). This reaction weakens the metal structure, making it brittle and more prone to failure over time.

Below are five proven ways to help control and reduce corrosion in water systems.

Pre-Commission Cleaning: the period between installing new pipework and bringing it into operation is critical. Carrying out a thorough pre-commission clean helps remove debris, dirt, oils, and residues left behind during installation.

Cleaning at this stage allows components such as valves and fittings to be flushed before they are fixed into position, significantly improving system safety and extending equipment lifespan.

Use Corrosion Inhibitors: water treatment solutions play a vital role in corrosion control. Both chemical and biological treatments can help protect metal surfaces within the system.

Metals exposed to corrosive bacteria are particularly vulnerable to MIC (Microbiologically Induced Corrosion). Adding inhibitors such as phosphates, silicates, or nitrites creates a protective film on metal surfaces, reducing direct contact with corrosive elements.

Monitor and Control pH Levels: maintaining water pH within the optimal range — typically between 7.0 and 9.0 — helps reduce corrosivity. Water that is neutral or slightly alkaline is far less aggressive toward pipe materials than acidic water.

Regular monitoring ensures conditions remain stable and corrosion risks are minimised.

Carry Out Regular Water Sampling: frequent water sampling is essential, especially in systems with copper pipework. Low pH levels can attack pipe linings, accelerating corrosion.

Routine testing allows early detection of irregularities in water chemistry, enabling corrective action before serious damage occurs.

Understand Pipework Materials: knowing the materials used throughout your pipework and how they interact with the water flowing through them is key to effective corrosion prevention.

Each system is different, and the most suitable control methods depend on factors such as pipe material, system design, operating conditions, and overall risk profile.

Final Thoughts

Because water systems vary greatly in size, complexity, and materials, corrosion control is rarely a one-size-fits-all solution. Developing an effective strategy requires detailed knowledge and professional assessment.

For best results, it’s recommended to work with a water treatment specialist who can carry out a comprehensive system analysis and implement tailored corrosion prevention measures.