Document gED7NbGk9XRbyxyXvXMvev6Q3

mmm* wmmmmm tm. mujnnwpfl LIA07225 a 'MSI I If I I I I I I I i$ I I I I I I : ---"------ iriBtab RED LEAD PRIMERS POR BE* GALVANIZED IRON OR VEATREREP GALVANIZED IttOW WITH LITHA'WE ADDITIONS - LIA #22 PROGRESS REPORT #1 Expoeedi Deeanbar 8, 195l| (Raw Galvanised) Hy 19, 1955 (Weathered Oelvanlsed) Inspected tot Deesnber 3, 19$6 Panola 980 - TOOOA.AD Panals 7171-91A The purposa of this project vas to deteralne tha affaet of Litharge additions. In varying aaounts, to rad lead-iron oxide paints on tha adhaaloa of thasa paints to now or weathered galvanlsad ataal, Tha Litharge additions rangad froa 1 to 8 lba. Straight llnsaad oil, straight alkyd, and a nlxtura of llnsaad oil and alkyd, wars used for tha vahlolas of tha TT?rlmtn tal prlaars. Paints eoatalnlng sine dust wars lnoludad for ooaparlson. Tha paints vara applied by spray to 12" x 12" panals using two ooata of prlnar ovar tha antIra area and a finish eoat ef an alualn-ja-cuaar paint LIA #379 ovar tha upper half. Tha prlner ooata ware applied at 1.5 alia dry flla thlcVnosa per ooat and tha finish coat at 1 nil. Tha new panels vara cleaned with mineral splrlta prior to painting. Tha weathered canals were cleaned with nlneral spirits and than placed out of doors and vsathersd for a oerlod of six nontha. Table Z oontalns a daserlptloa of the testa and lists tha inspection ratings for pealing. RJjjSTJjJSl 1. * pealing has davalopad on any of tha teats on vaathered galvanised Iron, 2. On new galvanlsad Iron, there are Indications that Litharge additions to rad lead-iron oxide paints do not improve the adhesion of thasa palnte. This conclusion la not final at this time beoausa only a few of tha paints hava pealing prsssnt, Rowavar, tha failures so far era all mong the paints with Lltharga additions. i LIA07226 2. 3* Thar* ara or* failure* aaong tha paint* *lth straight llnsaad or linaaad oil allqrd than aaong tha paint* with straight alkjd Tahlol*. It* Th* pealing falluraa ar* confined alnost entirely to tha ar*a of th* panala that haa thraa ooata. C. A. Lonlnska Do o m*bar 10, 1956 Distribution! * Messrs. B. X. Zlnemain (17) R. L. Uhltney W. A. Qlogar A. 3. Elekhoff R. P. Bata* Hr. 2. A. Oralao mm lli!PliW''lllpj|lMIJi|ili|jipBWPH.:ijl.PJ,WIWWBIfp||pp^|P|P *'`WI i l .mn.n|W n'a |*M| /mJJmi .... --`i-- '~ kO&a. -3- I TABLS I I Panal Wo. Dooerlptien 2 Coot Aroo 3 Coot Arp* I Ago-Moo. El 18 34 12 lo 24 Oroon Z I feoao Forwuloi 62* RL 38* ZO Vobt 2 porta LO - 1 port OE2466 SolIda I 6980 i|2PT Control-Wo Llthargo 69800 addition I 6981 1 lb. Llthargo par gal* 69810 10 10 10 10 9 9 10 10 9 2 I 6982 2 lb. Llthargo par gal. 10 10 8 1 69820 998 10 1 S3 a 4 lb. Llthargo par gal. 10 10 1 10 10 1 i 6981* 6 lb. Llthargo par gal. 10 10 6981(0 10 10 i Soeondorr Controlo 6995 Zina Duot for 1.0. fcy 6995 voltaso In Control i 6997 30* RL-lS* 10-55* Zb Ouat 69970 LXA #361 l 6999 40* HL-40* Zn Onat-20* 69990 Chroa. Ox Oraoo LXA 378 I 10 10 10 10 10 10 10 10 Pooling on t'oothorod Oolr. Stool 2 Coot 3 Coat Aroo Aroa "18 ' 18 1 ' 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 l Wotot Llthargo oddItIona roplooa on oquol Toluao of Iron Oxldo. I I% fI gf m u jmf f LIA07228 19 I TABLg I (OOHT.) 8 Paaal Pealing on Pew Calr. 8t*el J?o, Deserlntlon 2 Coat Area 3 Coat Area ---- Age-Hos. 12T1B"a,'- g' IB Sl I Oroow n Baa a Foraulat 69 RL - I 38^ Iron Oxlda Yahl OE2J(66 Alkyd-lj2.liPV I ms s 6985D 6986 I 6986D 6987 I 6987D 6988 69880 19 6989 69890 I Control - Vo Litharge addition 1 lb. litbarga par Oal. 2 lba. Litharge par Oal* !| lba. Lltharga par Oal* 6 lbs. Lltharga par Oal* Secondary Controls 10 10 10 10 10 10 1 1 10 10 1 10 10 10 10 10 10 10 10 10 10 10 10 I 6996 at Oust for Z.O. by Pol. 69960 6998 30 r l -11.0.-5& at Dost I 69960 LXA 362 10 10 10 10 10 10 10 10 Peeling on Weathered Oaly. Steal________ Z Coat j doat H8"- 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 I I I : I .(1 1 il 1 ppMeppMi i 19 TABUt I (COW.) Parting on Jaw pair. Staal Pntl Wo. Paacrlptlon Aft>No(< 2 Coat Araa 3 Coat Araa 12' is a, g-iar'a,- Oroapni baa* Pormulat 6Sf HL* 33* Iron Oxldo LO Tahtola-ljZPT 6990 Control - lo Lltharga 69900 addition 10 10 6991 1 lb. Lltharga par Oal. 69910 6992 2 lba. Lltharga par Oal* 69920 10 10 10 $ 10 10 10 7 10 10 10 T 10 10 10 2 6993 4 lba. Lltharga par Oal* 69930 10 10 10 2 10 10 0 2 6994 6 lba* Lltharga par Oal* 10 9 69940 10 9 Saeondarr Control 9 9 10 10 7000 80% Zn Duat - 20* toO 70000 TT264lb Tipa I 10 10 10 10 Paallag on- Vaatharad Oalr* T-.3t.al 21!oak j Coat Araa Araa IB----- 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 , iiiJtMiipgafiaaBjiggwipggBiBjjPiif^