Electrolyte AE 34 is a specialized chemical used in electrochemical etching and marking processes, particularly on metal surfaces such as stainless steel, carbon steel, mild steel, and chrome-plated surfaces. It is commonly applied in industries where durable black markings are required, such as on medical instruments, tools, engine components, and cutlery. The electrolyte works effectively with various grades of stainless steel (like 202, 304, and 316), providing consistent black marks, often utilized for permanent branding, logos, or part identification.

The process typically requires an AC power setting of 9 volts, and in cases where the marking appears weak, the voltage can be increased to 12 volts to enhance the results. This electrolyte is highly valued for marking hardened chrome surfaces and carbide tools, providing a reliable and clear mark that withstands wear and corrosion.