The other key, even with compatible metals such as Al and Stainless steels, is to minimize the amount of incompatible alloying materials, such as Cu. So, for storage situations, pure Al is the best, such as the 1100 alloy. We have used Al6061 for tanks on our KISS rocket, but this is for short periods only. Stainless 316 is a good #2 choice. HDPE is probably the best (cheap) plastic material, for room temperature applications, Teflon ideal. Metals used must be passivated to minimize the level of catalytic components at the surface and to form a good oxide layer (of Aluminum or Chromium) and the method differs depending on the metal. Any welding (TiG) of such metals must be done very carefully, to make sure that the welding electrodes don't accidentally contaminate the weld. Cleanliness of tanks or plumbing that contact high strength peroxide is second only to LOX service, where a fingerprint can ruin your whole day. Tin appears to be very compatible, but we haven't bothered to prove this. Avoid any coatings on base tankage metals, as they will flake off and expose the metal underneath. Many metals may initially appear to be noncatalytic, but this can change greatly over time or at higher temperatures, as different oxides are formed. Dan
In a message dated 3/27/04 11:15:54 PM, [EMAIL PROTECTED] writes: > Hi, > > I'm looking for peroxide compatibility information. > I'd like to have as much of it as possible, but I also > have some specific questions. How compatible is the > copper with the peroxide? What difference for > compatibility the stabilized peroxide makes versus > unstabilized? Is the tin compatible with peroxide? > I've heard that stannates are used to stabilize the > peroxide... > > It would be good to refer to some resource with a lot > of data regarding this. There are small compatibility > tables here and there, for example, in JBIS 1990 July, > but they are too small sometimes. > > Thank you, > > Alexander > > _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
