Picatinny Arsenal Etch Picatinny Arsenal Etch VaBeachZ (Mechanical) (OP) 25 Apr 07 13:30 Is there a substitute? RE: Picatinny Arsenal Etch kenvlach (Materials) 25 Apr 07 17:19 Do you mean the 'P-2' sulfuric acid-ferric sulfate etch used as a pretreatment for adhesive bonding of aluminum, as given in paragraph 220.127.116.11 of ASTM D2651, 'Standard Guide for Preparation of Metal Surfaces for Adhesive Bonding?'http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/D2651.htm?L+mystore+ffte0991The P-2 etch is usually used as a hex. chromium-free alternative to the FPL etch (Sulfuric Acid/Sodium Dichromate). There are proprietary etches, also, as well as (unsealed) anodize pretreatments.What are you trying to do? RE: Picatinny Arsenal Etch VaBeachZ (Mechanical) (OP) 25 Apr 07 17:56 Looking for the cleaning process for titanium before adhesion process similar to MIL-HDBK-691D, Pages 144-146, Para 5.3.XXXXXXXHave seen reference to P2 etch, but can't see the similarity of the two processes. The part dwg calls for phosphate-fluoride method IAW hdbk mentioned,I don't think the dentist office would want to do my product cleaning....LOLAppreciate the help. No vendors have any substitute method.Thanks, Everett RE: Picatinny Arsenal Etch rerig (Aerospace) 1 May 07 14:52 Boeing has switched to a SOL-GEL treatment for Titanium.The proprietary Data is:BSPS-07-001 SOL–GEL COATING FOR TITANIUM BONDINGBSMS-25-001 SOL-GEL Coating for Metal BondingThe commercial product is SOL-GEL AC 130.Google search SOL-GEL and you can find info.Can't give you the Boeing Data.Very simply, the part is Grit Blasted, and SOL-GEL is applied similar to an Alodine application.Then an Adhesive Bonding Primer is applied and the part is bonded like normal.We have been using it very successfully.And the EPA loves us for it. (No pickling fluid to mess with) RE: Picatinny Arsenal Etch VaBeachZ (Mechanical) (OP) 1 May 07 15:49 Thanks, I'll look into it as you suggest.