The polished finish process takes place using special machines and materials that, through continuous vibration and rubbing, clean the chain giving it a polished, bright appearance. This treatment will not protect the chain from any rust..
A raw finish is characterized by the absence of surface finishes applied at the end of the production process.
A raw chain is intended for applications whose practical use does not require any specific protection from external agents and corrosion.
Electrolytic galvanizing according to UNI ISO 4520 and UNI ISO 2081 standards
The process of electrolytic galvanizing is designed to ensure better protection from and resistance to atmospheric agents by acting directly on the entire surface of the chain, especially the contact points of the rings. The process performed follows the UNI ISO 4520 (passivations) and UNI ISO 2081 (zinc plated coatings) standards.
Hot galvanizing according to EN ISO 1461 standards
Hot galvanizing of steel creates a coating that is extremely effective against corrosion and the formation of rust. Through a metallurgic reaction, a completely continuous layer of Iron-Zinc alloy is formed which is impact resistant, preventing contact of the chains and related accessories with the atmosphere.
Through this process, which consists of immersion in a bath of molten ZINC at approximately 450ºC, double protection is achieved:
the first is physical, due to the interposition of the zinc between the surface of the steel and the atmosphere, the second is electrochemical which is due to the potential difference between the two metals, that is, the zinc layer corrodes and is consumed, protecting the steel the chain is made of.
The chain painting process can be performed in two different ways.
Powder coating is a protective technique that ensures ecological compatibility in addition to being the aesthetic finish par excellence. In this process, solvents or other toxic substances are not used and the powders themselves do not contain substances which are toxic or damaging to humans or the environment.
A second process involves the chains being coated with synthetic resin-based painting powder (for example epoxy powders) that adhere to the chain due to an electrostatic effect and then are passed through an oven where the paint melts and is polymerized by the high temperature, creating a layer that adheres to the chain.
Both processes are performed to ensure better protection of the chains from corrosion and from atmospheric or external agents.
Chains produced using stainless steel provide excellent corrosion and oxidation resistance qualities.
This resistance is useful in those settings in which the product cannot lose its integrity and must maintain full functionality and usability, even if exposed to particularly aggressive chemical substances or agents (such as in marine environments, agriculture, or poultry farming).