. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . made from heavy plates of suchuniform quality that corrosion does notseriously aflfect them. To overcome the tendency to corro-sion in the smaller sizes a process hasbeen evolved, known as is technically defined as follows:Spellerizing is a process of treatingmetal which consists in subjecting theheated bloom to the action of rollshaving regularly shaped projections ontheir working surfaces, then subjecting -As a matter of fact, the process ofSpellerizing metal may be consid
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . made from heavy plates of suchuniform quality that corrosion does notseriously aflfect them. To overcome the tendency to corro-sion in the smaller sizes a process hasbeen evolved, known as is technically defined as follows:Spellerizing is a process of treatingmetal which consists in subjecting theheated bloom to the action of rollshaving regularly shaped projections ontheir working surfaces, then subjecting -As a matter of fact, the process ofSpellerizing metal may be consideredanalogous to the kneading of doughfrom which bread is made. Dough iskneaded to produce a smooth, uniformtexture; to facilitate the escape of con-fined gases, which would form air holesand other irregularities, and to make aneven grain and a smooth surface. Muchthe same results are obtained by Speller-izing steel. In a general way. this illus-trates the principle on which the Spel-lerizing process is based: that is, theaim is to make the metal uniform, sothat corrosion will be uniform, and not. W KOIGHT IRON PIPE .MTER IMMERSION IX RUXXIXG MIXE \V.\TER. ^TIVE BY CORROSION:SPELLERIZED STEEL PIPE, 73 PER CEXT; WROUGHT IROX, 100 PER CEXT. in several forms: puddled iron, knobbledcharcoal iron, ingot iron and soft weld-ing steel have much the same chemicalcomposition as commercial products butmay differ considerably in physicalproperties and durability according tothe treatment given in process of manu-facture. Lniformity. both as to chem-ical composition, density and characterof structure, and finish have been provedto be the most important factors gov-erning corrosion in pipe. The actualchemical composition of the iron orsteel is of comparatively little impor-tance, provided it is not unduly variablein the same piece. In so far as pipe is concerned, the the bloom while hot to the action ofsmooth faced rolls and repeating theoperation, whereby the surface of themet
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
