What automotive work requires
- Corrosion to a stated salt-spray rating, verified by test.
- Cr6-free (Cr3+) coatings per RoHS/ELV.
- Traceable quality documents (certificate, lot traceability).
- Lot-to-lot consistency, especially across high-volume fasteners.
Fastener-specific risks
High-strength screws/bolts (class 10.9/12.9) risk hydrogen embrittlement after electroplating, so they need a hydrogen-relief bake.
Coating thickness must be controlled so threads do not bind or torque values drift.
How we help
Cr3+ zinc, phosphate and hardening, plus a hydrogen-relief bake for high-strength work.
Hardness/thickness/salt-spray testing with documents attached per lot as required.
FAQ
Does automotive need Cr3+?+
Usually yes, per RoHS/ELV—we plate with a Cr6-free system and provide documentation.
Do you bake high-strength bolts?+
Yes—a post-plate hydrogen-relief bake lowers the embrittlement risk on high-strength work.
Can you issue per-lot quality docs?+
Yes—test certificates and lot traceability as the customer requires.
