Document ddg5mOMD8drLz3wXa2DDD0o6

m LIA07198 ----->1-0 . -rn* . -------- |f-- .x-.. * I^ LEAD INDUSTRIES ASSOCIATION : m i mimi mi I ana 60 bit U2nd SUoott NfWTOW 17. N.T. ) r October 5, 1956 l &LX ?r na.WB T^WIOL UITJt *o. U To Makers of tb tod Load fachnleal Coaalttaof Attachod la copy of a lottor, datod Sopttabor 28, 1956 fTea Dr. Joaoph Bigot, dlroetor of roaoarcfc, Stool Structurot Painting Council, coo--titing on tod Load Technical lottor Mo. 11. In Mr. Zlogfold'a abatoco froa tbo city ha baa aakod at to forward tfcia to the Coaalttoo oattra for tholr tcrutlny and raaarka, tddeh ha can paaa ou to Dr. Blgoa. Mr. Zlagfold will roturn to tha offloo on Octobar 19. Tory truly youro, ^ ) 0 U- tv Socrotaiy to Mr. tlogfalA. -"'v- iii.fiifl i|ftiij,gpPBlpF?yq!P!lP^^ uw a f.'iq N2796 snot nxxmntu immso codcn. Uoo ran atdtos nmKKM u, a. Septanbar 2, Ujt Mr. X* L. 1offold, SeexwtorywCreeearer lead Xnduetriaa Uiwilrtlti 60 Ud U2nd Street Sew Totk 17* Sew Zoric Soar Mr. Zloffalda Z here jMt aeon Sod toed Teohdool totter So. IX. Tide la a flee piaoe of technloei Information which will bo of freot eelao to tho people worldBc with paleto. Vo particularly want to thank yea for tba rxcallact publicity tad rwoopniU.cn piwan tho Stool Strootoree Hiahiag Cooooll. Bowwwor, Z with that yoa bad hc*n thla to aa prior to poblloattw bootmo it aay cauoa co dlffieulttee. At the raftoitlcc of to*. J. 0. Joclacc. Z vast to ocaaont to you ott ecae aapooto whloh here not beaa properly oanoidorwd, particularly in rafted to too mo of blaot , On pofa 5 tho eubjoot of aand or abot blortlnf it dlaoMood and rofaraooa la oado to Stool Struoturea Painticf Council* Surface tkoparatioa Spaelfloatiee to. 5 - $2T. IMa oowaro wbito aatol bloat cloonjnf. It la oxtraaoly wnfortmtto that tho totiro papar itiai to hawo booa baaed ^n white natal bloat olaaniaf. Thla typo of bloat +ton*rt la iitrailj oarponotwo and la required for loot than li of tho awfooe aroa which la blAg% So Motion la aada of too oonaorelal bloat el aanine apaclfloo. tlan whloh eataraciae too fraat propoodoranoa of actual bloat <f eparatlena and which la eatlefoetcry for practloally all moo. Mdto natal bloat eloanlnf la only required for axtraaaly eorroeloe araoa wbai4 or rary, twry rlfld rurfooe preparation la required -- auoh aa fer aetolllto Inf. toot wator 1--anion and aoot ahanloal axpoauroa aro adequately oowarod ty owarcrltl bloat olaontof without half tho aoot or laoa of nblta natol bloat elaonlaf. toueh-off bloat claanlnf la alao Mod wry extooclwely at a wary oooaaaloal goat bococao of tho fart roto of cWnlnf. It ty apprordjMitaly aquiralanl to powor tool claadcf aa rofarda wett*bl21`_ af tho prtocra, *to,# but actually It la pooolblo to mo brwoh-off bloat *1*^~<*f with noat of tho ayethotloa If tho orqwowo la not too aonro. On po<* 6 undor Alkali Claanlnf too atotaaant woo aoda that alkali eloanlnf la loee hooordoM than aolvont eloanlnf. Thla la not correct elnea there la ao haaard eoncaotod with aolwont elaonlaf provided aofb eolweuta sw N2796.01 * % i j h MllWIVIlli.Ji.JlliJIMillilliP.il DtJI'-l! jfjijiiuiruiniipiwiiip imipm LIAC7200 .l nffrt'inifV- mi*M> Mr, ft. U ZtsgfuU i`i iiii nhfiMfc (ft) Scptembr t9* 1 & ar* **d, A1 halt <i1 --nl ng oa tb* other hand U considered to b* quit* hatardou*. Th# next paragngsfc state* that alkali cleaning does sal remove rut inhibit!** oil*. This statement 1* la contradiction with th* statement tsadsr Steam ClaoniAI cm tb* oaxt peg* which *ay* that "If th* dstargectsteam'water alEtura la sufficiently alka Una, It will alto remove greaac,* It la in* that some rust Inhibit!v* oil* will not b* removed by wt^ claanim. However, alkali --lltlco cleaning, which doaa oem* under a mU|U7 of alkali cleaning will raerv* any rost inhibit!** oil. Un, th* laat aantanoa 1* not quit* oorraet whan It eayw that th* surfao* not b* rla**A with a dilut* acid watar. It la quit* possible to rins* th* surfM* with fr*b watar and haw* am adequate allotnation of alkali. Th* first *oot*oo* ef th* paragraph under Staau Cleaning lmplls* that It 1* u**4 when it 1* lapoasihl# to solvent wipa th* surfao*. To th* eontr*ry, ataau cleaning la th* httr method of tb* two by far and solvent wiping 1* used atan atea* cleaning 1* impractical or too ooatly. Th* s*oond to last senteoo* >Ul fret Federal Specification and iSBf Specification* ocrr th* us* of Stoddard Solwant. To the ocrtrory, th* federal Spwlflotttf and -S7H Specification oovwr only notarial require*ant*. In a* way 4* thay ooewr th* us* of th*** materials, particularly for *olvt cleaning. Th* chart* on page* 9 and 9 whloh tl la vwrfae* preparation, drying tliaa, paint*, and uaes, are of great value, It la unfortunat* that th* blast cleaning -- which 1* what Ik. J. 0, Jackson ha* obj*oted to -- 1* laprcporly cho*an, at least frcn our riew point. Thar* la only on* pl*o* In Udn chart when bloat cleaning to whit* natal night ba oon*ld*r*d neceeoory and that 1* far rtrwotural steel la chantoilly oaotcndnctad .tmosphares. Bat rren her*, th* further olaa* ideation cf dl storce-e tanka and th* ua* of rhil oally ecntaninatad rather than elate cl atmosphere* airtonatloally nodiflea th* aerele* to the point whor* orwwcrclal bloat clseeing 1* adequate. In foot, sent ell storage tanka or* d*quat*ly cloaned end palntad with band cleaning or power tool clearing. Tb* next row cower* structural rtael la ataocpberlo exposure and reccnund* blast cleaning to efelte natal owing L.Z.X. 6-7 which la TT-P-66a, Type XX. TT-P-&6*, Type II 1* widely good and rwcmawyWd for powwr tool cleaned surfao** end 1* la wld* uc utt*> faotorlly over bend cleaned rtrfcoe* which ore cleaned carefully. To ladleat* that blast cleaning to white natal 1* neceecory with such a primer 1* going to do a gr*at deal of hare to the painting industry. Ibo** statement* ar* generally true for th* remainder of th* chart*. I *a *nalotlag>a oopy of th* teehaloal lettar with further Indication where I feel that blast si-ring specifications are for too rigid and far too costly. In addition, there era a couple of remark* concerning th* uo* of wash primer pretreetmeot la plao* of Fhosphat* fhetrertment Bo. i on an alternative basis, actually, th* wash primer pretreatasot 1* batter for n*w galvanised Steel than ftetrsetmamt I*, t., but th* option should be left to tho u*r. S hep* that Z haw* not bean too harsh In ay crunts, but I m sur* that you ar* just os much oonoarned In having taohnicol lnfcsuatlsa lsauad which is th* beat urr*ntly available as w* ar*. X great daal *f progr*ss has bean mads recently in getting oonsultlng onginsars and fab ricater* to realise that blast cleaning Is *eoocsdoal. Several of th* l*rg*#t fabricators ar* nor la th* prooaas of setting up blast slsuli^ JWWWMpB'IMIIMBg irni util r iw i