Document NaRQnyL3jyBZaMgY12OGDE5b

FILE NAME Keene KNE DATE 1953 Feb 3 DOC KNE021 DOCUMENT DESCRIPTION Memo RE Rust and Corrosion - 85 Magnesium vs. Kaylo Marshall F. Alien Manager USAA THE MAGNESIA INSULATION MANUFACTURERSMANUFACTURERS ASSOCIATION WASHINGTON 4 D. C. 620127 620127 620127 . . 1317 F Street N. W. Executive 3008 . ream February 5 1953 qrepn SUBJECT Rust and Corrosion - 85 Magnesia vs. FROM Mr. Harry A. Kieselbach Kaplo Mr. Muehleck has requested that the following tests described by the writer at our meeting On January 22nd be furnished you in triplicate Flease bear in mind that these tests were of the Kitchen laboratory type and can cators serve only as indi- They are subject to check by properly controlled tests simulating actual service conditions Purpose of Tests 1 2 3 To check reported claims by Keylo salesman that a 85 Magnesia accelerates rusting of iron pipe b Karlo inhibits rusting To determine whether 85 Magnesia will cause conrosion electrolysis in the absence of oxygen Dc Kaylo 4 To determine whether 85 Magnesis made with and asphalt emulsions exhibits less wax chemical ac- tivity than the untreated product , Materials used in Tests Standard 85 Magnesia Block Keylo Block K voltage ' Small cube of W.R. Magnesis M Canadian Asbestos Sports H for , readings only ) ePe USAA 620128 RUSTING | ; Test No. 1 :. 1 Iron filings Magnesia Kayle and to soak submerged 855 were sprinkled on lumps of W.R. Magnesie which had been allowed in open dishes of tap water for 24 hours Duration of test - 20 days to make up for evaporation Tap water was used - All samples showed about the same Thin strips of iron from / bands were placet in open test tubes containing containing s b) c d Tap water Tap water in which allowed to soak 85 Magnesia had Do. Kaplo Boiled tap water to remore air in stoppered test tube been rubber Results -- Very little difference in the quantity of sediment in E b and c A few specks in d Kote This test was conducted at an average of about 80 deg F. The test tubes were SUB- temperature of about 60 deg and about two inches pended at an angle return line to induce slight abore & 1steam heating currents in the liquids in the test tubes the convection line was warm about 50 of the time during The return day and about 25 during the night ELECTROLYSIS AIF EXCLUDED Test No. 3 Strips of iron were bolted to strips of sheet brass and placed in stoppered test tubes containing a Tap water in which 85 Magnesia had been allowed to soak b Do. Kaylo c Do. W.R. M nesie -$- USAA 620129 Test tubes were supported in the manner des- cribed for Rusting tests for a period of about two months Results -- Kaylo showed the greatest corrosion { deposit at bottombottom of test tube Magnesia showed about 1/3 that bottom 1/10 f of Karlo Magnesis showed about that of 85: Magnesia in the ated completely These results indicate that with an improvement W.R. process corrosion might be elimin- They also indicate the reason for the activity of the manufacturers of Kayle insuletion in research on water- repellency ELECTROLYSIS AND OXIDATION The purpose of this test was to determine whether these materials would form electrolytes wher immersed in water and to obtain an approximation of the voltages developed between an iron pipe and a brass valve or fitting exposed to such materials under water The composition of the brass or bronze used in the manufacture of valves is probably different from the sheet brass used in this test and might show somewhat different results were electrically Strips of iron and brass connected electrically suspended in open jars containing tap water and a 5 b Asbestos c Lumps of Magnesis lumps ofKaplo Canadian Shorts placed house The heating jars were steam boiler and on top of an insulated maintained at an average temperature of about 9E de .F. The liquid level in the jars varied due to evaporation and the contents were allowed to dry completely three times during the test Voltage Feadings Brass Brass Brass Brass Brass to Inen Meter 20,000 ohms per reft ^' a b c 0.52 C.4E C. Volts Volts * average average " Current Readings Brass to Iron Meter 4,166 ohms a b 0 600microamperes average - about 300 sc in of iron microamperes 500 measured usst Not in measured of measured average - about 250 iron a ox USAA USAA 620130 The Iron Strips Showed Rust Deposits as follows b c Very little Located at level of average Entire surface heavily About 50 of surface water covered Extending down from As the test proceeded & deposit over the contents of the Magnesia jar and formed in the Kaylo jar immediately under of rust settled a dark green deposit the iron electrode General On the basis of these crude tests the writer believes it safe to assume that Kaylo will not cause less rust or corrosion electrolysis than 85 Magnesia on piping submerged under water be the CESS In fact the opposite may It appears that accurate laboratory tests siru- ~... lating actual service conditions conditions could be used to in overcoming the claims made by this competitor advantage HAR BE Very truly yours - t= . . - . a ena ee ee toh aE on7s 4a H. A. Kieselbach