Why do we galvanize our ramps and what are the advantages over other treatments:
Why are our ramps hot dip galvanized and not painted?
Painting consists of using a compound typically consisting of:
- Basic solvent that makes the solution liquid and applicable
- A binding film-forming agent which serves to adhere the film to the surface
- A plasticizer that serves to make the film mechanically more resistant and elastic
It is a SURFACE COVERAGE of the base material carried out for reasons that can be PROTECTIVE, AESTHETIC or A MIX OF BOTH.
By its nature, paint is therefore the coating of the surface of an object with a colored film of a substance that dries or cures. The resistance of this type of roofing is limited by the quality and composition of the three elements mentioned above. Furthermore, once removed for physical or chemical processes such as a shock or trivial atmospheric agents, it does not offer any type of additional protection to the underlying material it covered, which, if subjected to oxidative processes, will suffer them without any escape.
Regardless of the type and quality of the paint, it is an ECONOMIC and INEFFECTIVE process.
Hot dip galvanizing, on the other hand, is a TREATMENT as well as a covering, applicable exclusively to metals, consisting of several cleaning phases of the base material (degreasing, pickling and flushing) so that the piece to be subjected to this process is free of any agent. contaminant and subsequent immersion of the material in a molten zinc bath at 450 °.
The molten zinc envelops the surface of the base material and penetrates it through vent holes specially made in the objects to allow their entry and subsequent release, creating a layer that covers it entirely, inside and out. Due to the high temperature and the chemical affinity that exists between metals, extremely strong atomic bonds are formed between zinc and iron which create a thin intermediate layer that is a mix of both, to then become externally pure zinc.
Zinc, due to its less stable and more reactive atomic structure than that of iron, becomes a sacrificial material that offers cathodic protection from chemical as well as mechanical agents.
Despite the higher cost for us, it has been several years that we have chosen to exclude painting in favor of hot dip galvanizing since this treatment allows us to combine the superior characteristics of resistance, resilience and intrinsic ductility of carbon steel, with excellent qualities of inalterability and chemical stability; ensuring operational longevity otherwise unattainable with aluminum alloys or stainless steel since even if they are much more expensive materials they are mechanically less performing.