Galvanizing is a process that actually coats the steel with metallic zinc. It requires tanks of cleaner and acid to prepare the metal, and a tank of molten zinc into which the components are immersed. I reckon it is unlikely that Greeves had such facilities, and I've never seen any reference to galvanizing. Of course they could have farmed it out, but what would have been the point?
None of their advertising or brochures mention zinc plating or galvanizing - and you can be sure that they would have advertised the fact had they been doing it.
As I mentioned above, the steel frames and other components of Greeves bikes were prepared by bonderizing, some types of which provides a zinc phosphate coating.
Wilkipedia says:
"Parkerizing, bonderizing, phosphating, or phosphatizing is a method of protecting a steel surface from corrosion and increasing its resistance to wear through the application of an electrochemical phosphate conversion coating.
The process involves submerging the metal part into a phosphoric acid solution whose key ingredient is often zinc or manganese, with varying additional amounts of nitrates, chlorates, and copper.
In one of the many processes that have been developed, the solution is heated to a temperature of 88–99 °C (190–210 °F) for a period ranging between 5 and 45 minutes".
None of their advertising or brochures mention zinc plating or galvanizing - and you can be sure that they would have advertised the fact had they been doing it.
As I mentioned above, the steel frames and other components of Greeves bikes were prepared by bonderizing, some types of which provides a zinc phosphate coating.
Wilkipedia says:
"Parkerizing, bonderizing, phosphating, or phosphatizing is a method of protecting a steel surface from corrosion and increasing its resistance to wear through the application of an electrochemical phosphate conversion coating.
The process involves submerging the metal part into a phosphoric acid solution whose key ingredient is often zinc or manganese, with varying additional amounts of nitrates, chlorates, and copper.
In one of the many processes that have been developed, the solution is heated to a temperature of 88–99 °C (190–210 °F) for a period ranging between 5 and 45 minutes".
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