Letter 35056

Electroless Ni-P-SiC composite coating [India] 

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Hi,
I am presently doing the Postgraduate project on this topic. I have some difficulties in tha tlike I am using the acid hypophosphite bath containing 30g Nickel Sulphate,10g sodium hypophsphite,10g sodium acetate,5g SiC particles and substrate for coating is of mild steel.i am not getting any coating on the substrate.i want to that why this is happening? Also I want to know that how much coating thickness should I get if I hold the substrate for 3 hr in that bath? I am using the nital etchant to observe the coating,is it a appropriate etchant?

Mahajan Devendra Ashok
Student - Pune

You left out the most important parameter--Temperature! Also what kind of agitation are you using? How are you activating the steel?

James Watts
- FL

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