Letter 13067

Coating questions 

I need to ask only couple of question.

a. we have done many cable tray and cables ladders and other electrical power angles and other more stuff which all was required 110 Microns our zinc consumption became 7 to 9 % is this right consumption?

b. we are facing problem to have coating on edges of beams flanges other area of the same having quit good coating, if we go increase our immersion time to having coating on the edges then other part of that particular material getting thick coating, Since its hard for us to regalvanizing we are matching the standard coating by prime zinc spray.

Please rush reply.

Regards,

Muhammed Babar
National Galvanizing. - Al-Khober, Saudi Arabia

Assuming hot dip galvanising:

(1) Make parts cathodic (-6 Volts) and make tank anodic. This encourages higher deposition on sharp edges.

OR

(2) Reduce temperature to increase viscosity

Good luck.

John Tuohy
- Ireland

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