Glossary

What are transonic airfoils, and what is the active clearance control? Check out our technical dictionary and find out more about engine technology terms – from active clearance control to velocity triangle.

Electrochemical metal removal (ECM) Eddy-current inspection Electro-discharge machining (EDM) Efficiency Electroless nickel plating Electropolishing Engine 3E Engine price Enthalpy reaction rate Etching (etch inspection) Etch inspection Exhaust jet

Etching (etch inspection)

Etching serves to detect machining and structural defects as well as segregations and to determine grain sizes. The acid solutions used for etching attack different material structures more or less heavily so that structural inhomogeneities can be rendered visible by this process.