Additional post-etching services

Forming and finishing

We offer manual and semi-automatic precision forming using standard, modular and custom form tools.

Where possible, bend lines can be incorporated into etched components, removing the need for hard form tooling.

In-house spot welding is available for formed, 3-D components which require a permanent connection, such as nickel silver shielding cans.

Electropolishing and passivation
TONGJIN Etching offers two post-etching corrosion protection processes.

Passivation: Passivation purifies the component surface and forms a micro-coating of metal oxide to protect it from corrosion. This process will not change the dimensions or overall appearance of the base metal.

Electropolishing: Electropolishing produces a brighter, smoother surface finish, reducing surface roughness by up to 50%. By reducing micro-crevices on the metal surface components are up to 30 times more corrosion resistant than those which are passivated, making it ideal for medical instruments.

Heat treatment
For components that require increased surface hardness, temperature resistance, ductility or strength, we offer heat treatment by way of hardening, tempering, annealing and normalising.

Surface finishing
Materials can be specified with a non-reflective, dull, bright, mirrored or grit finish to improve component form or function.

Available post-process surface finishes include:

Vapour blasting
Anodising
Electroplating
Chemical blacking
Chromium nitride
Bonding and brazing