Document NEwxvvxk1pwEz8EeaZGgpgzdb

-------------------------------- - mi------------------------------------------- ---- -- PAXAMA CASA1 COMMIT CAKAL ZOMI kBOUICDM TO SCTODfTWDaiT OF ST0RDB03B3I Balboa Height*, C. I, October 22* i$S6 Red Uad , 1, La mad* to your memorandum dated April 20, 1956 to the b**<gw<f EBflnear on tba above subject, Tba following raport La furnished la accordance with your request. 2, faint and palatine a^* Important items la oar annual budget, With tba high buaidity, temperature, and praelpltatlon eoodltloaa that prevail la tba Canal Zona any palnta fail la much laaa tlxa thaa might ba considered a reasonable life e> pectancy under aora favorable climatic condition*, Until raeaotly it baa baan tbo practlca to paint farroua natal roof* with aa Iron ozida paint (fadaral SpecLflcetloo). Although auch paint ai<ht normally ba expected to fir* several year* of ser vice* eaaaa of fallura la a rear or ao were c o o m< Sea* of tbaaa fa11ora* ara pro* bably dua to laproper proper* tied of surface, However, It ia coaaidarad that tba straight Iron ozida paint mi^it not ba tha most auitabla paint for Ita lntaodad usage, We ara now using aa Iron oxide paint containing sine-dust* alno-oxlda aad aluminum povdar with *itt appaara to bo improved raaulta. Aa thla paint baa beam la oao for only about twj yaara >* are proaantly unable to folly evaluate ita worth* 3* Tbo following aztarior roof paint ia applied over our roofa after they bar* been primed with alnc-dust* *Inc-ozida for (alTaniaed aorfaeoa aad rad load for noogalvanised natal aorfacaa* flgent not under 581 consisting ofi Synthetic Iron Oxide (calculated aa TejOj) Zinc Oxide Ziao Chrenato Aluminum Powder (leafing type) Tehlele not over h?t consisting of* koD-rolatila 751 mini-- Linaeed oil (TT-O-369) Alkyd Resin (linaeed oil derivative* phtallo anhydride content 30 to iGf) Tung Gil (gag-proofed) Volit11a k Drier ooctant t$% -- Water not over Coarse partlclea (J2S siera) aoi over Dry not ever 55 to 651 205 minimum lol minimum St to 71 6St 201 151 0.51 3.9L IS bSura be Tba principal uae of rwd lead palnta ia tha Maintenance Division ia tba painting of steel reservoirs In tha Atlantic Area, Thla use ia broken down into two principle class ifLei tinos, nasely Interior and exterior. *"* have not had long experience with tha use of rad lead primers and palate ia tha Interior of tha steal reservoirs* slnoe a system of eathodlo protection ee* ia amrvloo until about Sevan yaara age* 5 IB the painting af tank interiors wa have bean using paint system Mo, 3 la Tablo 10 of Volume 2 of tha Ribllostlon tyatema and Specifications prepared by tbm Steal Structures feinting Council, This system is based on the use of red lead tkgfBMffB*' .AW M'M.'.P.IU) .'TWWpr HS N2805 WPPfWPliP'PMliP^^ LIA07Z19 painte Mating the requlrMeota of Federal Specification TT-P-86a, type IT* Tm eeati of rod l**d iri applied to the food bleated bare natal with on IS hour drying porlod after each coot. A third coot of alualnus poedar and pheoolio reels rarnlah la applied aa a flalab coat* 6* for one la painting exterlore a here need a three ooat t/atea eoaalatlag of a flrat ooat of llaaoad oil--rad lead partner Mating tba requiraseota of Federal Specification TT-P-860, Type X* The llneeed oil prlxor la aaad for tba flrvt ooat beoauae of lta auporior penetrating and adheeire qualltlee* Tbla la follovad by as extended drying period aftar ahlch a coat of pbonolla red lead prlaar (TT-P~86e Type XT) la applied and allowed to dry for a rinlnun of 19 bovra* A fialeb ooat of aloadaua povdar and phanolln reals rarexiab la N 1. U. Broader. Jr. X. L SSDTX3, A. Acting engineering md Ccnetroctloa Uractor .* :4 I mm