The zinc plating is utilized in various fields as representative rust-proof plating.
It is extremely effective for preventing the corrosion of iron and the external appearance has been improved by the progress of plating bath and chromate treatment, so the application for decoration is also highly evaluated recently.
Characteristics of zinc plating
The comparatively complex machined shape can be plated in almost even thickness and the mass-production processing can be implemented easily.
As the zinc is passivated in the neutral use environment, the corrosion rarely become activated in the area pH8 to 12 and the rate of corrosion in the air is very slow; approximately 1% of that of iron.
As the sacrificial anticorrosion action against iron is strong, the rust-proof effect also functions even if the plated surface is damaged and the iron basis material is partially exposed.
The chromate film as a post handling prevents the white rust of zinc for a long time, so the rust-proof effect is superior to that of other rust-proof treatment because of the synergetic effect of 1 to 3.
The plating cost is cheaper than that of other plating processing.
This plating is superior in secondary workability after the plating.
Compliance to RoHS
RoHS is the order for restricting the use of specific harmful substances for electronic and electric equipment that contain six substances that are harmful to humans and prohibiting the import and sales in all 25 EU countries, which was officially announced in February 2003 and has been enforced since July 2006. Our company complies to it instantaneously and shifted the lead-free and hexavalent chrome to trivalent chrome to establish the environmental friendly plating technique.
