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Tech Tip: Minimizing Corrosion in Water-Cooled Sensors

Historically, corrosion in our sensors manifests as pitting corrosion in the anodized aluminum.
There are a number of factors that contribute to pitting corrosion including dissolved oxygen, chloride ions, more “noble”/cathodic metallic ions in solution, and excessive pH values (less than 4 or higher than 9). This is why we recommend neutral DI water, which maintains a healthy pH and removes chloride and metallic ions.
While it is commonly believed that DI water is especially corrosive, we have not encountered many references with careful measurements of this. Here’s what you need to know- read our full tech tip: https://www.ophiropt.com/laser–measurement/knowledge-center/article/9375. For more general information and guidelines, see our article “How to use Ophir water cooled sensors”.

Corrosion in anodized aluminum



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