Document 3QZEe6mzEOJ3OX4yoQ1m84mLD

**>*%< M Lead Indiialrfca Aaftor.ialion -4-20 LEXINGTON AVENUE N'1-:\V WHK.X.V, Ootober 11, 1929. TO THE MEM3F.RS OF THE LEAD INDUSTRIES ASSOCIATION; Research or. Protective Pipe Coatings Last May the Lead Industries Association learned that the American las Association was cooperating with the Bureau of Stand ards in an investigation and actual field test of pipe coating materials used for protecting gas lines from corrosion. Inasmuch as red lead 13 an excellent protective material for ferrous metals, we were curious to know whether the proposed Investigation was de signed to include red lead among the coatings to be tested. We were especially Interested lr. the subject as recent experimental work in California indicated that red lead, when baked upon pipe, makes ar. unusually effective priming .-.oat, c'.kir.g seems to prevent any possibility of chemical or solvent inter1 ctor. between the red lead and the secondary coal-tar or aa.m'.!' c-riv.. Upon inquiry we discovered that the te r wui to be competitive but intended to apply only to asrhaltic and riturn1nous materials. Te outlined twls situation tc the Directors and were authorized by them to sec if, in the interests of red lead, the Lead Industries Association v.ould ve weIccr.e ;..s a participant in the proposed ir.vestiaati cr.. The "htlor.ai L^ad Company kindly offered to place the facilities of its Laboratory and s'iff at our disposal and assisted greatly in subsequent developments. he trr-r"ufor. vlsitea Washington to persuade the Bureau of Standa-Uo -n; the Gas nsscc latior. to ; marge tne score of its pro posed te' . ro include red lead and althcug- ,,e trade cur request at the elever.'h hour both parties agreed to our suggestion. ,-.cc crdlr.gly we have entered red lead in con.per ition with nu merous other protective pipe coating materials in the investigation mentioned above. During July and August untreated specimens of steel pipe L-ere coated at Versailles, fa., ,v1 th coating compounds used by grs sorranies. In our case v.e dec! dod to use two different types of coating, (a), a pri. ir.g coat of red lead baked upon the pipe, followed by an application of an asphaltic coating and wrap per manufactured by tho hational Tube Company, (b), a red lead coating baked uron the pipe followed by a secondary coating of a bituminous material, - in this case a product of the v;al les-DoveHermlston Company - bltumastic enamel. The application of tho red lead coating was supervised by tho rational Load Company, It was, of course, impractical for us to test every asrhaltic and bitumin ous coat in conjunction with the usa of red lead.