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R^T IN PEACE! 



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PREVENTION of the rusting and corrosion 

 of mechanical equipment is one of the 

 crave threats to the prosecution of the war 

 both with our armed forces and on the home 

 front. 



The farmer who suddenly remembers that 

 he left his tractor plow in the field three 

 months before with its shiny motdboards 

 protected only by a coat of cylinder oil and 

 returned to find it completely rusted could 

 have saved all this trouble by using one of 

 the new rust preventive compounds. This 

 experience is not uncommon, because most 

 any farmer you question will acknowledge 

 that he has spent many hours scouring rusty 

 plow bottoms with a soft brick or replacing 

 broken machine parts that were weakened 

 by rust. 



The great need for a farm machinery 

 fust preventive is revealed in surveys of the 

 annual use of farm machinery in Iowa, 

 Indiana, and Kentucky where it was found 

 that the most important farm machines are 

 only used from 9 to 15 days per year. Dur- 

 inj( the remaining eleven and one half 

 months of the year, some of this machinery 

 will stand outside several months between 

 crops, some of it will be housed in open 

 sheds and some of it will stand outside the 

 entire year because of the lack of shed room 

 or because the machinery is too large for 

 housing. 



This new rust preventive weapon which 

 increases the efficiency of farm machinery 

 •nd labor by eliminating lost time and broken 



Outdoor Form Machinery Storage Now Safely 

 Possible Due to New Rust Preventive Compound 

 Spawned by War Experience 



(Reprinted by Courtesy Farm Implement News) 



By R. I. SHAWL 

 Unlvaraity of Illinois College of Agriculture 



equipment due to rust has just been released 

 for retail sale the last few months by several 

 of the large oil companies. These new rust 

 preventive compounds are not paints but are 

 usually petroleum greases or liquids to which 

 chemicals have been added to prevent the 

 rusting of bright or unpainted metal parts 

 while not in use. These compounds are 

 easily applied by brushing or sometimes by 

 spraying and are readily removed with 

 kerosene or any petroleum fuel when the 

 machine is to be put into use again. 



Rust preventive compounds prevent the 

 rusting of machinery because they adhere 

 firmly to the metal, which prevents their 

 being washed off, and form a nonporous 

 elastic film through which air and moisture 

 cannot penetrate. These compounds will pre- 



Machinery being preporod ior aoie out- 

 side storage with a rust proToaiiTe greoa* 



which will give rust-farae protection ior a 

 TSCB or more. 



vent rusting when applied over wet surfaces 

 because they absorb the small amount of 

 moisture present. They also stop further 

 rusting when applied over rusted surfaces 

 and will loosen up rust already present. 



When using axle grease, transmission oil, 

 or crankcase oils to prevent rusting of ma- 

 chinery surfaces, the amount of protection 

 against rust depends largely upon the viscos- 

 ity and thickness of the coating. The reverse 

 is true of rust preventive compounds, be- 

 cause thin films of these compounds when 

 properly applied will give protection for 

 quite a long period. 



A good rustproof compound for farm 

 machinery should meet the following require- 

 ments: 



1. Provide a protective film over the metal 

 surface that will not crack, peel, or slip 

 under extreme ranges of temperature and long 

 periods of exposure to the elements. 



2. Prevent rusting when applied to surfaces 

 containing moisture and stop further rusting 

 when applied over rusted surfaces. 



3. Be easily applied by brushing or diluted 

 for spraying. 



4. Contain some lubricating properties if it 

 is to be used to prevent rusting in bearings 

 or moving parts. 



5. Be easily removed preferably with pe- 

 troleum fuels. 



6. Be easily removed from hands and cloth- 

 ing. 



Tests run by the Department of Agricul- 

 tural Engineering at Urbana during the past 

 year and a half have shown the superiority 

 of the new rust preventive compounds in 

 preventing the rusting of machinery as com- 

 pared with the common farm oils and greases 

 now used for this purpose. 



Results ei Tests 



, Two sets of tests were run under outside 

 exposed conditions in which the rust pre- 

 ventive samples were applied to polished black 

 metal strips } inches by 12 inches, and to 

 plow bottoms. Fig. 1. Three inches of the 

 top of each metal strip was left untreated 

 as a check, and the low^ 9 inches of each 



I. A. A. RECORD 



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