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- Characteristics
- The Origin of Cold Galvanizing
Traditional hot-dip galvanization is the process where a protective film of zinc is formed by dipping steel structure into melted zinc as a high temperature.
Since hot-dip galvanization exhibits high anti-corrosion performance, the process has been widely used for steel structures such as bridges and steel towers.
However, hot-dip galvanization can be processed only in certain-equipped factories, which makes onsite re-galvanization impossible if zinc film partially peels due to welding or cutting.
For touch-ups of such damaged spots, normal paint products are not suitable because they do not have strong protection of hot-dip galvanization process.
This problem was solved by researchers in Cambridge, England, in the 1940s.
They invented a brush-on paint which contained a particular resin and ample amount of zinc dust.
This invention revealed that dried paint film containing more than 95% zinc dust had an anti-corrosion performance equal to that of the hot-dip galvanizing process.
This idea is the basis for the ROVAL.
ROVAL is called "cold galvanizing" because it does not require high temperatures and like that of the conventional hot-dip galvanizing process.
ROVAL can be applied in touch-ups of un-galvanized spots, and in the restoration of old steel structure and ROVAL will prolong steel life.
