Most temperature cycling test chambers on the market feature an inner chamber made of stainless steel. However, after prolonged use, rust may still appear on the equipment. Why does this happen, and are there effective ways to prevent it?

To implement proper anti-corrosion measures, it is essential to first identify the causes of rust formation in temperature cycling test chambers. Avoiding these causes will help prevent corrosion. The inner chamber is typically made of stainless steel, while the outer casing may also be stainless steel or steel treated with electrostatic powder coating. The primary factors leading to rust are:

Two Key Causes of Corrosion
Corrosion-Inducing Environment – Exposure to conditions that promote corrosion, such as high humidity, extreme temperatures, or polluted air, creates a favorable environment for rust formation.
Corrosive Substances – Even stainless steel can rust when exposed to corrosive agents. The most common factor is chloride ions, which are present in acids, alkalis, and salts. Stainless steel is particularly susceptible to corrosion in humid environments with chloride exposure.
When both factors coexist, the temperature cycling test chamber is more likely to develop rust. To prevent corrosion, the following measures should be taken:

Anti-Corrosion Measures
Use purified or filtered softened water for testing – Unfiltered water may contain impurities that accelerate rust formation.
Keep corrosive materials away from the equipment – Avoid placing highly corrosive chemicals or instruments near the chamber.
Maintain dryness – After testing, wipe off any condensation inside and outside the chamber.
Protect against rain and snow – If moisture enters the testing area, clean it immediately to prevent prolonged exposure.
By understanding the causes of rust in temperature cycling test chambers and implementing these preventive measures, you can extend the lifespan of your equipment. If rust has already formed, remove it promptly and take preventive actions to avoid recurrence.