46046

Hardchrome plating emission limits for open electroplating tanks [Pakistan] 

August 6, 2007

Dear Sir

What is the emission limit for open tanks during hardchrome plating?
Note that We are not using any fume suppressant in our tanks.
please help!!

Best Regards

Mohsin Siddiqui
Assistant Manager - Karachi, Pakistan

Hi Mohsin,

The U.S. specs for chromic emissions are very tough, ie. 0.05 mg/cu M....maybe too tough.

The specs back in l978 in B.C. were ll grains of sulphuric/chrome per 1,000 cfm (or was it per single
cfm, I forget).

Using an ordinary but very well built CT-120/2 blade type eliminator, we achieved 0,34 grains .... that's equivalent to 30 times lower than those specifications BUT translated into metric, it's only O.7OO mg/cu.M Yes, I have that in writing.

You definitely need some exhaust.

Does this help?

Freeman Newton - White Rock, B.C. Canada

Ed. note: Welcome back, Freeman, and get back to 100 percent soon.