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Hi unclesyd about the process for the fasteners Im not sure (Ill find out and get back to you) about the passivation it was per ASTM 967 Nitric I (what is t4 temp?)

Thanks TVP thats what I wanted to hear the passivator told me that for 15-5 two hours are too aggresive....

dear all we perfom passivation per astm a-967 on screws made from 15-5. when we test them for two hours in salt spray we get rust could you advise please thanks

jedward Do you know of any difference between 6061 T6 to 6061T6511 for optical elements?

hello we have an alumimum casting (356) that went through vacuum impregnation and then alodine after that when wiping the cast with a white cloth we discovered black stains on the cloth. any one have an idea why? if we remove the alodine chemically and then coat it again will it harm the...

dear israelkk and TVP thank you for your answers TVP, Im familiar with the spec you have mentioned but Ive also heard that some aerospace companies follow what israelkk said. indeed we cleaned the scale with alumina and then performed passivation. israelkk do you have any spec that you can...

Hi All our drawing specified hydrogen embrittlement relief for PH 15-5 H 925 after passivation process. the processor forgot this stage. someone told me that for ph 15-5 after passivation in nitric acid you dont have to perform hydrogen embrittlement relief . is that true? and why?

Hi All I have parts from PH 17-7 SS with TH1050 (RC~38-40), it was passivated after machining but the vendor forgot to perform HYDROGEN EMBRITTLEMENT RELIEF TREATMENT I know that this process is to be done within 4 hours after passivation. are those parts trash? what can we do?

Is it necessary to perform hydrogen embrittlement relief after coating Invar with black chrome ?

hi, can someone please advise the difference between matt and bright tin plating from: 1. corrosion point of view 2. soldering (still using little Pb) it is applied on aluminum for soldering WHAT IS PREFFERED? thanks

hi, can someone please advise the difference between matt and bright tin plating from: 1. corrosion point of view 2. soldering (still using little Pb) it is applied on aluminum for soldering thanks

HI ALL I have some part that I have to repair with 1. Type I color No. 611 (LAC specification L-722D 2. aluminized finish per MIL-F-7179 Type III Does any body knows these specs?

Hi all Im looking for the thickness of the solgel conversion coating treatment on titanium. (I think its in a range of few micron-meter but I need more accurate data) can somebody help me here

Hello everybody I know that my question is not pinpointed but can someone tell me or refer me to the best way of treating silver wastewater?

how long can I wait from application of alodine to application of mil-prf-23377. I read somewhere that if more than 72 hours elapse I need to reprocess the part. can someone shed some light onthis issue