Document NN8g2BYVpQXpNNR228BaqrkZp

N2757 -. -_____________ _____ _ - N.L^JLIeai ...... .--------------------- 532 North Street Fortaaouth, Virginia Hr. Bobsrt U ttagfald lead Industrie* Association 60 East t2nd 3tr**t 9m York 17, N.T. July *, 1957 D*4r Wr**vs1?e^lflal Raport oe UX.A. #328 paint on bottcaw 0J. Navy min Ii 1. After getting excellent raaulta with L.X.A./328 paint in lutairtil panel tests, the U.3. Navy started sendee taata of tha paint on tha bottoee of three destroyer* - OSS Vogelaang (00-862), OSS Robinson (00-562) and CBS Saalp \ (00-672). Result* fron taata on tha Vogelsang ara atatad in a aweorandua laft with you than m confarrad on June 8, 1956, I an now reporting raaulta fron test* on tha othar vesael* and auseerlslng thaaa taata. mm* ' "' 2* Tha Roblnacn and Healp doekad at Norfolk Naval Shipyard on April 15, 1957. Beeeuss of delay* la punping tha dry dock. It was not poaaibla to aakn inspection until next dap. Although X took data and oonfarrad with tha navy inspector, X ham dalapad report until tha shipyard's official raport was aade to aaaura that data agreed on warn raportad. Tba report* ara datad Palp 22, 1957, and I ham examined thaw, Tha aarlt grades, baaed oe 100 being perfect, i ant g? WEBg Fouling Corrotiee Sulltfr"5 BuitlACSa Antifouling Biln X-X.A. paint on starboard bow 99 t.I.A. paint on starboard aidaMp 9* L.X.A. paint on port midship 97 L.I.A. paint on port quarter 99 Navy #UN oe port bow 100 Navy #UN on (larboard quarter 9 99 95 99 95 99 95 7 95 98 95 96 95 yjpiMifP--iiww y nl IfiSJO&U l.I.A, paint on atarboard bow 1*I*A. paint on starboard aldahlp I.X.A. paint on port midship t-X.A. paint on port quarter Navy #UN on port bow Navy #UN on atarboard quartar 99 99 97 98 98 98 60 40 75 40 50 70 45 30 65 30 30 40 j 3. L.I.A. paint proved alightly Inferior to navp antloorroalvo Alp bettoe paint on tha RobIneon, but It "afford* protection that 1* equal or vanr (lightly bettor than navp atandard antloorroalva formula #14N, oe tha OSS Heal/.11 (The ahippmrd report on tha Vogelsang, dated January 15, 1957, state* "no sig nificant difference in performance" between the two paint*,} 'in 4. Tha duration of thaaa taata warei 0 USS Robin*on - October 11, 1954 to April IS, 1957 *U33 Healy - October 20, 1954 to April 15, 1957 USS Vogelsang - Oecaafcer 7, 1954 to DacaAar 10, 1956 The Haalp waa dockad atNorfolk Naval Shipyard on March 30, 1956, axaainad and undoekad without any painting being dona on tha bottoe. Oat* ara la aamoraikhai left with you on June I, 1956.) J wijMBnwwEP! ii'i)) ^2757.01 mm LIA07293 I.I.iteMt -2- July 24, 1957 5. Bavy testa of L.X.A. #32 point are now eopl#t*d. Th* thru* bottoe* Kit * been sandblasted and pointed with standard point*> Th* result* 0 My be *ux*Mrl*d and appraised as followii (A) Zt 1* navy standard prectics, whan pointing bottoms, to sand blast to th* mUI, opply oc cost of "surfse* conditioner" (Bvy #117),them apply th* ehipbottom point*. Bic iu m th* ptn*l t**t# indicated that L.I.A. #323 point gY* satisfactory result* without th* u* of "eurfao# conditioner" th* aldehip Motion* of th* thro* bottoms war* ueed to check thl*. Th* *! vie* t*t *how th* b*n*fit of applying "Surface Conditioner.* (B) Boraally L.I.A. paint product* thicker fll** than do** navy standard antleorroalv* paint, #l4Jt, and thia la an advantage. Th* effort waa sad* in th** **rrle* tft* to obtain fils* of equal thickn***. Although th* official report do** not aentlon it, X noted that tha effort to get thick fll* whan applying th* standard antleorroalv* paint on th* Vogelsang o*u**d th* fUa to crack on drying. Th* cracked flla waa aanded off and th* area repainted. Flla thlekneee w* aea*ur*d at nay points a* painting progressed, and the average 1* alightly la favor of the L.I.A. paint - approximately ),l ail* v*. 5*0 Bilaf 3 coat*. 9 i i (C) On th* Robinson and Vogelsang, th* antifouling paint u**d over th* antleorroslv* paint* was th* very thick (22 all.) flined "hot plaetia #15HPN." On the Kealy, a relatively thin (9*12 all. 3 coata) filmed antifouling paint we* applied. The hot plaatic i* the standard for which a fire year life la clalaed. The thin flined paint, "cold plastic #105," 1* deelped for naall boat* that are lifted froa the weter, and about one year** service 1* anticipated. Thu*, on two of th* v****la, th* tert was aor* of a test of th* antifouling paint than a coeporlson of two antleorroalv* paints) line*, had th* thick antifouling flla functioned at expected, water would not have gotten to the anticorrosive fllos. The hot plastic flla often crack* when the vessel pastes through the Oulf Stresn. Also, thl* flla tends to sag when exposed to direct, hot eunrays* It did sag badly on th* Robinca before the vessel undocked la October, 1954, Chly on the Realy waa a real comparison of navy anticorrosive and L.X.A* paint obtained, and bar* results ware affseted by ltrtgularitie* - an lnterla docking, during which th* flla was exposed to th* atmosphere and th* duration being such longer than the ex pected life of the antifouling paint flla. But the L.X.A. paint proved superior to the navy standard in this test sine* th* protection we* glvna largely by the anticorrosive flla*. (D) It 1* probable that th* record* of th*s* testa will be fll*d at th* Bevy Departaent and forgotten unless there arise* occasion to do other wise. The navy now manufacture* it* ahlp bottoa paint* and apparently ha* aegis fund* to continue standard practice* regardless of costs. If th* navy 1* forced to discontinue aanufacturlng th* antleorroelv* paint, considerable difficulty probably will be enoountered, Th* aarlt of this paint 11** largely In It* varnish ingredient which 1* aanufactursd at th* shipyard. It has besa demonstrated that unlforsdty of quality cannot be obtained through purehas* under specifications and competitive bidding. The aanufaoturing cost of navy anticorrosive paint 1* relatively high because it Bust cover th* aanufactur* of vamieh. There la th* further (explication of a pending (employee-govemnent) patent covering th* paint. Oh th* other hand, th* L.X.A* paint carrl** non* of thee* factor*. It can be amply covered by purchase specifications, doe* not involve * special varnish, can be easily manufactured at relatively low coat, can be easily applied without use of special equipment. hhen and If i th* navy 1* forced to oonoalt*, th* L.I.A, paint should b* attractive. I. ! 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