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Psaetrol
Totrust 2m, ffl-1336
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Marshall laboratory
Decce_mb,er 0* 1950
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The original Report Ho* 14-263, dated .August 21, 19'h9f dis missed oar knowledge of these ompetltlire products at that time*
.Analytical breakdowns and exposure results were reported* the a*posurss indiesting relativelypoor protectlye properties as -systems* This .supplementary report cohere results which .ha? been .obtained in S.-X0666 which evaluated thee products* under durable top-costa emh as g.5^050 DulUk Red and I66-220 Dolus Alimtlnuou
After I? months piorldo closure on win brushed rusted bhanael ironss the results .anted below have boon obtained* Delaware results .follow the same pattern bat t a les-sey degree of failure*
Rust-pisumi
S-9802 showed poor durability of mm, and two .eoabs of Rash* Oleum products 3^10666 demonstrate that bettor results sr obtains
with, a'durables hop-at of -25*050 over the Rust-Oleum, bub that. the m a primer does not afford the protection* of one of oar'
lowest grade primers-, 373*819* & following tabulation of results {S-1066^} will how a comparison of .Rust-Oleum Tarsus three of our standard primers, .25*->050 B.ultm Red feeing the top-coat used over ash. pri
p
2nd Coat
AS rating
Rust-Oleum ^586 (10)
Rust-0learn $-769 (SO.) 373-S19 373-785 67-820
25-050
25-050 25-050 25-050 25-050
5*9 6,0
7*5 8*5 9,5
^Sating of 10 is perfect * Reflalshing indicated at 8,0-fcl
failure 01mt the rusted channel irons was due principally to blister type popping of the mill seal whioh remained intact at the time tlw
panels ware wire brushed*
The of & dure pie intermediate coat such as 6?-
S20 aftbr-th Rmt02. asm. pjeir(isa: 00 at ahowa. a dofinit
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under a sound system* .Primer
Rust-Oleum #566 Rust-0Isum 769
2nd Coat
67-820 67-820
3r& Coat 25050' 25-050
,\STS4 Ran..*,
a 71?
A test to evaluate SR-42081 Rust-Oleum h$}$ Drying Oil (thinner for SO type produofcs, also m aluminum vehicle) proves. it
definitely inferior to our 166-220 Aluminum, The Rust-Oleum vehicle plus tm lbs, of aluminum paste pea? gallon 'was compared against 166220 over the same Rust-Oleum prims? witis. the following results;
Primer
2nd Goat
- ngfli Rating
Rust-Oleum 586 Rust-Oleum #566
166-220 Rust-Oleum Vshiol * 2$
*1# Paste.
8*5 4*0
Another group of exposures, S-10883, is now in progress to correlate wit.h tbs field test systems which. were applied to Tahfc NO, TS-81 at the chambers works., Recent inspection -of both the field test am panel exposures show nothing significant to report et this
time, This-test-includes our oeuafca.f-matofe to Rust-Oleum and will to reported on whan anything of interest l-bvelops*
* Pe.nstrois
This product showed poor durability in S-9946 when .xpossd
without finish coats as reported. in the original 12-263, In S-10666 it was exposed under 6? -020 and 2 5-0.50 ? and Is returning .satisfactory durability, but is no better than the two eo.at system of 67-620 aM 25-050 without the Peaetrol ss the first'coat.
In S-10968 m are evaluating this product further to orrelait with the field test under way at the Texas CompanySs Eagle Point Refinery,, Tvestvill, N, I Oar p-yo-R-54464 Linseed Oil Penetrant is
included'i*1 both the exposures and field tests. Neither has shown -any significant failure to date,
Totrust;
SR-42039 Tctrust Pod followed by one Oat of 25-050 shows hai# pro.da.ot to bar definitely poor durability as & primer over rusty metal ;
its A,8,Tl4. rating of 4*0 being well below that' of 573-019",
Qomlm ions;
This review oonfirms e*jr prsirions saspioions as to the low relative talas cf Rust-Oleum sad Tctrust for mata-1 protection, Additional
exposure of the tests ooyerirg Peae'trol will be necessary before wo tar, draw alit co.nclu&ieos-s as to Its reel praisa-felT ^aic*-,.
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