Document 9MnRJ71E4LLLKaoxbbB4kDwD

I iVmM * LIAC798A text Hta N2823 L LI A07985 f awap p * mmmrnmm I l " l mutnetr er m rr botoao cr son KLSHmna t$, d* e* n sour ma to KS/UK 3U7) 5r 34*7-461 .. iu load lateatrlaa IwoditlM Orayfear Mldlng 420 Laxlngton Avwaw Ba* York, Ba* Teat lk AHt 1SS3 Attention Nr. C. J. Vaster Talk Oantlanont * tha final report baa baao raoalead trm tha Norfolk Naval Shipyard *iloh ocnrara tha eocparatiwa taat with your Aaa relation and aiafcar flrwa on ahlpbottca prlnar*. A copy of tha raport la aadoaad for your Information. Jha roaalM of uat or tha fact that tha Uat oaa conduct*! ahall not ba uaod for alvertlalnc porpoOfa or for tha dlaaaslnatlcn of lnforoatloo laadlac i to aaa hy othar than tha fodaral Ooaarnnanw It will ba notad that a eonalterabla teyraa of toplanantatlon baa alraady boon authorliad hy tha Buraan to carry out aonflrnatory *Mp> board tasta of tha raport'a finding*. Plaaaa corny to all in your Aaaoelatlan oho t* Involved tha thaika of tha Bureau for thalr auatalnad lnt*raat la thU cooperative Invaatlfatlon. Sincerely your*, (ndt (1) Berfolk ftaport No. $6S a/ Denial y. Orahna D. f. OraSan Haad, Coating* and rraaarvatlon Branoh tff Wractlon aj ji LPi^iil (Hi .I'll.inti l. Sil iim-iii .* N2823.01 I cams r*ai nwa MKPCRT staractra ncmm - conunn tor m u&fi DDDsms lssoaiirai uro am me litgr NjNti 15 Mi 1953 -06X-0C tatelk TMt Stiiil No. 566 (fMMrljr C-06I406) hilt tAbmlMT Norfolk lto**l Shipyard * 6, cowcumaPt a. Based oa tbo results of this tMl Dm following eoccladoce are < aada* (1) Three of tbo 37 ohlpbottea paintit* lyoteaa ahowd wtttwflni performance la resisting deterioration and eere superior to tbo others, Inclod. In* tbo llery standard oold plootle and hot plastic a/staae. These ojoti on fiS, fl2 and tlit aad awra atrmlfbt vinyl sgrataae. (!) torse otbor eyateae, 937, 97 and #6 ahoood good performance aad appeared to ba aboot equally effective la thlo roopoct bat they sere alightly Inferior to the throo vinyl fyetaao. The eyvtene Included tbo Bevy standard hot plootle ayetaa and tbo UT.A. 329 aatlcorrooioa/Ktvjr oold plootle oetlfooling qrtUa, (3) Tbo vinyl ayetaaa ahosed a tendency to alio* n*ri pitting of tbo pointed atool occur chore tbo protect! v* paint flla brooks. (li) toe soaab prlaor* pretreataent la la general aoro beoafleiel to tbo palat o/o tea than tbo Navy pb*phorle add prrtreatoeat. (5) Thor* lo little to oboeoo between the typo of o*aah prlaor* containing tine chriaate (UJ.4. >06) la tbo om ease aad load chrcasto (1.1.1. 339) la too otbor oeae. (6) too eoato of Rory 105 antlfouliae *er* equivalent to fo coats ct vinyl antlfoollng (L.J.4. 337) In flla Udckaaca. (7) too anti fouling propertleo of Navy 105 **r* allfbUy Mporlor to tbo vii^l anti fouling paint* (UI.l. 337). (8) The vinyl anticorrosive paint* required fear aoats to ebtala tba d**lr*d flla tblcknaa* vhlle aoot of tbo oloo-rodaou* typos of anticorreeive required only too coats. N2823.02 1 LIA079E7 IP (9) Red lead or red lead mixed piguerrt anticorrosive primer* 1a a vinyl resin vehicle or resinous vehicle euoh as a cwmrorm indane seal tar-chlorinated rubber ehoeed **17 good performance. (10) Red lead mixed plgnent primer* mad* with vehicle blende ef allqrd re*lft-phenolle reeln varnish chewed eery peer perfemano*. (U) System )5 (havine a bet plaetle Antlcorroelve wndereect) and System J7 (having a bet plaetle antifouUng topooat) did net ahow quit* ne good performance el the best vinyl system*, bat gave considerably greater total ceatlng thickness In fewer coats ef paint as ccaqmrsd with the ether St*tarns and base the advantage ef l^er application coot* T. iccorummaat a. It la rape--ended thati (1) Ctae of the vinyl ehlpbettem paint eyitema (pi$, #12 or /lh) aheold be given a thorough eerrlee test evalnatlon iy quarterin'* A owSber ef active ships with the vinyl paint ayetaa and the standard hot plastic system. Rile part of the vinyl paint testing program has already been practically accomplish'd fay the Bursas ef Ships durin- the past year, eleee approximately 2) vessels have received vliyl paint (System lit) at Norfolk Naval Shipyard, and a nueber of similar vinyl paint application* have bean mad* by the Mare lelaal and Fhlladelphia Baval Shipyard*, (2) Two nerwrlayl antlcorroelve eyetews, l.e. System ? (L.7.1. 926) and Systae J5 (Norfolk hot plaetle anticorrosive) should be service tested on several vessels et Norfolk. Tta bueau of Ships ha* already authorised thee* eerrlee evaluation* ty S19/1(531) S*r $33-2159 cf $ An*. 195?. Borfolk will prose*d with the test* es soon as the experimental paint* ean be made* (3) Norfolk should be permitted to proceed with eerrlee testing at the experimental hot plastic antleorroslve 00 th* basis of the new Improved fomula 117-100 developed ty modifioatlon of formula 11*7-5$ to improve th* eraeklnc resistance and adhesion properties which were ecmewhet deficient In this Vest, t WPpWiPilWWSi LI A 07 96 8 uw<aa^^aMia*4MiB^aa*4^arA1fatfa*daii*iiri' a' **JiaM*fr*uawBi*a<te4.ai*aMMaia*<*<iaaft^ ' faint ijtUmt LlataR in Daaoaodlnc Crtar #f H*rlt ictartlna Vo final f (PtoUcUy* Tala*) t*XU>t_ 8r*-- *>' Pratraafant 1$ 1.1.1. 339 12 1.1.1. 306 Intl normala inti fooHoc Ratlnt uoTw? 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