It is very useful to understand the different treatments used in the production of iron and steel products, whether they are surface treatments, subsequent manufacturing or finishing.
Surface treatments Cladding methods include:pouring molten cladding metal onto the basic metal, followed by rollingsimple hot rolling of the cladding metal to the basic metal
Any other method of deposition of the cladding metal followed by any mechanical or thermal process to ensure welding (for example electro-cladding)Bear in mind that ferrous products clad with non-ferrous metals remain classified under Chapter 72 provided that iron or steel is the predominating metal by weight.
Plating methods include:coating with metal through immersion, hot-dip galvanising, tinning, hot coating with lead and aluminium coatingelectroplating, for example with zinc, cadmium, tin, lead, chromium, chromium/chromate, copper, nickel, gold or silver.
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