Hi Edward,

Normally sodium carbonate, for chromic acid plating baths anyway. (250 g/l
chromic acid, 2.5 g/l sulphuric acid).

Best Regards,

Ken McGowan, Dublin.
----- Original Message -----
From: "Edward Szpruch" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, July 17, 2001 7:44 AM
Subject: [TN] Scrubber for NOx


> Hi,
> We are using nitric acid for stripping of plating racks and during this
> process some amount of NOx escapes to air.
> We have been requested by environmental authorities to install wet
scrubber
> for absorption of NOx.It seems,that diluted alkaline solution ( such as
> caustic soda ) will do the job of absorption of NOx.
> What is the common practice? I presume some of plating shops are using
> nitric acid for racks stripping.
> Best regards
> Edward
>
>
> Edward Szpruch
> Eltek , Manager of Process Engineering
> P.O.Box 159 ; 49101 Petah Tikva Israel
> Tel  ++972 3 9395050 , Fax  ++972 3 9309581
> e-mail   [log in to unmask]
>
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