Inquiry (采购产品): Phosphoric Acid Testing Can you perform Phosphoric Acid Test as follows; TEST PIECE: NAS1101E4H20 Screw, Dry Film Lubricant Coated (Ref. .250-28 thd x 1.25 long) PREPARATION OF REAGENTS; (a) Ammonium Molybdate Solution - 0.5 gram of ammonium molybdate shall be dissolved in 100 ml of cold water and the resulting mixture poured into 35 ml of nitric acid (Specific Gravity = 1.2). (b) Benzidine Solution - 0.05 gram of benzidine base or benzidine chloride shall be dissolved in 10 ml of concentrated acetic acid and diluted with water to 100 ml. PROCEDURE - A small amount of the coating shall be transferred to a clean filyter paper by lightly rubbing the latter over the coated surface. A drop of ammonium molybdate solution shall be placed on the transferred coating, followed by a drop of the benzidine solution. Then, the paper shall be held over a container of ammonia until a blue stain appears, either momentarily or continuously. If a blue stain does not appear, either momentarily or continuously, the part shall be rejected. Please quote or advise ASAP. If you are unable to perform, please provide an alternate lab. Your suggestions are appreciated. Thank you, Fred Aparicio Hoefner Corporation South El Monte, CA Ph. (626)443-3258 / Fax (626)443-0754 **** Hidden Message ***** Fred Aparicio 9722 E. Rush Street So. El Monte, CA 91733 USA Company: Hoefner Corporation Title: Prod. Control/Purchasing Phone: 626-443-3258 Fax: 626-443-0754 E-mail: hoefnercorp@sbcglobal.net **** Hidden Message ***** hoefnercorp@sbcglobal.net
