Zinc Electroplating is not a very durable/useful coating.Its thk is also around 15 microns only.Better ones are Cadmium Plating,Hot Dip galvanizing and Barium carbonate coating.
Regards
Aarpee
On Tue, Nov 24, 2009 at 6:30 PM, Ohm-Srinivasulu. K <nirgunaya@yahoo.com> wrote:
Our proposal for A216 WCC Body (Non-Sour) as follows;
Body Studs & Nuts (21000 Series): A193 Gr.B7 / A194 Gr.2H zincplated
(without chromated)
Body Studs & Nuts (35002 Series): A193 Gr.B8 CL.1 / A194 Gr.8
Gland Studs & Nuts : A193 Gr.B8 CL.1 / A194 Gr.8so my dout is in humid areas like Japan we need the bolts to beZincplated/bichromated to prevent white rust and in hot areas likeQatar its not required.Please confirm my understanding,(As the specs were basically developed by JGC they specified aszinc plated/bichromated)Ohm-SrinivasSr. Piping Engg.
ohm guru namasivaya
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