Precision Micro Develops Etching Process

A team at Precision Micro has developed a process to make Elgiloy, an austenitic super alloy, 'etchable'. Elgiloy is based on cobalt and is an erosion and corrosion-resistant stainless steel. Photo etching is a manufacturing technology that produces intricate, burr free, stress free, high-precision profiles by a process of controlled erosion. On the face of it, Elgiloy and photo etching should be incompatible.

This was the case until the process development team at Birmingham-based Precision Micro came up with a process route that the company claims has solved the problem. 'The solution does not just involve a combination of etchant chemicals,' said Bob Crutchley, director. 'A methodology has been developed, whereby a treatment is applied prior to etching and a catalyst is introduced during the etching process itself,' he added.

The process utilises standard photo resist materials and chemicals that have no exceptional hazard risk. It is designed to enable engineers to utilise Elgiloy in a wider range of applications in the medical, aerospace, automotive and advanced engineering industries. Elgiloy offers high corrosion resistance, temperature resistance and high elasticity modulus.

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