Hydrogen Embrittlement

detecting Hydrogen, entered in Parts (Hydrogenation) during plating process, by means of any chemical.

Did you try search CR4 here un hydrogen embrittlement? There are a few good posts about it.

[PDF] METHODS OF TESTING FOR HYDROGEN EMBRITTLEMENT -A simple search would have gotten a bazillion results like the one above.

Samp, understand that hydrogen embritllement testing and detecting are two different things. Testing requires samples and is usually destructive in nature. It's carried out to look at your process to ensure it is not introducting the problem of hydrogen embrittlement. Detecting implies NDT (non destructive testing) and I'm guessing that's what you're looking for.

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The correct way is to load the spring steel to at least 75% of the yield strength or the wire (in tension or shear depends on the way the wire will work) and keep it under the load for 200 hours. I it will not crack or break after 200 hours it is OK. If this is a compression spring to be on the safe side I would compress it to solid for 200 hours. This process can be seen in QQ-P-416 on any MIL-STD for electroplating.

Israelkk, what you are telling is right, but it is a mechanical testing. I want to know whether there is any chemical testing procedure available so that it can be detected in a very short time.

If such a test was practical it probably would have mentioned in the MIL-STD or any reputed code such as ASTM. Secondly any intelligent customer will demand a test that is backed by reputed specifications. Thirdly, as the manufacturer you take a big risk if the product will fail in service. Therefore, I would recommend to take the mechanical test to be on the safe side.

evaluating Hydrogen Embrittlement by chemical process

Your google result points to chemical processes that cause embrittlement! Nothing about chemical detection processes. Google does not always handle context very well.

http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/F1940.htm?L+mystore+yvst4574+1196145312

Having said that, there is no particular chemical test that will reveal hydrogen embrittlement. The steel you are working with is actually susceptible to hydrogen embrittlement. The devil will be in the details. (1) Avoid high temperature during plating since this enhances hydrogen diffusion, (2) Avoid plating potentials where the steel is in contact with solution when the proton reduction potential is reached for the pH and temperature of the solution, and (3) offer a beverage to Faraday during the process. (LOL).

I don't know if this is standard practice, but why not plate with zinc first, if you are not already doing so? Even a thin layer of zinc should help prevent hydrogen penetration into the steel, at least that is my humble opinion....then you can overplate with chrome or nickel to your heart's content.

by the way, I am not a world expert on plating, just a Ph.D. physical chemist.