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PRODUCT AND PROCESSES

PRODUCT AND PROCESSES Corrosion proof motors Pumping corrosive fluids Composite welding stud A range of squirrel-cage induction A centrifugal pump—the Nobox—which To combat galvanic corrosion, a welding motors, designed for use in the corrosive is claimed to have excellent resistance to stud, half aluminium and half mild steel but non-explosive atmospheres found in corrosion has been developed by the has been developed in America. It is used Swedish company, Jonkopings Mekaniska chemical plants, plating shops, gas works, to attach aluminium roofing to metal Verkstad. The pump has no stuffing box salt works and oil refineries, incorporates rafters. The steel end is welded to the and has a liquid lock wheel with the sealing a fan of moulded phenol formaldehyde rafter, or purlin, and the aluminium end which is claimed to have withstood severe located entirely on the suction side. The is riveted to the roofing. durability and fatigue tests. The fan is pump is claimed to be absolutely tight and mounted on its shaft by a special method. to require no maintenance. It is vertically Porcelain saves steel pipe in Polyvinyl-acetal-covered wire is used for mounted and designed so that it is possible chlorine fluxing operation the stator winding. The windings are to dismantle the whole pump without impregnated with phenolic insulating var­ removing the motor or motor stand. The The service life of black steel pipes nish by dipping and baking them in an liquid handled by the pump can be used used in a chlorine fluxing operation was lengthened 12 to 20 times by coating the for sealing even if it contains large con­ automatic heat-controlled oven four times; piping inside and out with porcelain centrations or solids—up to 55 to 60%. this process is claimed to produce a finished enamel, according to an article in Chemical The makers point out that, since there is winding capable of high resistance to cor­ Processing. An estimated saving of more no packing to wear the shaft, the corrosion- rosive chemicals. The rating plate is made than 2 million lb. of pipe in 18 months was resistant surface that is sometimes applied from polyvinyl chloride. achieved. The cost of the coated pipe is to certain materials does not wear out. The motors are made to British Standard comparatively five times that of uncoated dimensions and are available for outputs New epoxide resin pipes. An additional advantage is that use up to 25 h.p. They are similar in appear­ of the coated pipe has eliminated the con­ ance to the normal totally enclosed, fan- A new type of epoxide resin now being tamination of the aluminium alloy through made by Leicester, Lovell & Co., Ltd., cooled machines. The English Electric Co. the dissolving of the iron. will further extend the use of this versatile Ltd. are the makers. class of resins. Applications range from The experiment was made at the works Anti-corrosive tilter for acid carboys the gluing of precious stones in their of the Reynolds Metal Co., Listerhill, settings to the manufacture of durable Alabama, U.S.A. In the fluxing operation A new device for the safe pouring of chemical-resistant structures with glass a bent pipe is held by the operator while acids from carboys embodies features which fibre reinforcement. it is poked through a hole in a furnace are claimed to make it less susceptible to containing molten aluminium. The bent corrosion than is usual with such equip­ Specific advantages claimed for the new end of the pipe is placed near the bottom ment. This tilter is in the form of a cradle epoxide resin (known as Epophen M-777), of the molten metal. Chlorine gas then designed with a dropped base so that the are absence of inconvenient exotherm even flows through the pipe and bubbles up bottom of the carboy lies within a circular in large masses, great strength and tough­ through the aluminium. Before coating, retaining ring. The sliding clamp attached ness of castings, and lower cost. the service life of the pipe was only 8 to to the tilting handle rests firmly upon the To facilitate initial small-scale testing by 10 min., owing to the effects of the chlorine top of the glass bottle (from which it is industrial users, a compact test kit has gas and molten aluminium at high tem­ insulated by heavy-gauge rubber tubing been brought out which provides suitable peratures. The temperature of the interior and the clamp does not touch the iron skip quantities of resin, catalyst and filler to­ of the molten aluminium ranged from or hamper at all. By this means the usual gether with complete instructions and 1,250 to 1,350°F., while the surface tem­ metal ring surrounding the neck of the equipment for measuring and mixing the perature of the bath frequently reached bottle (which so often corrodes, and may adhesive. This test kit (price 7s. 6d.) and 2,ooo°F. Also, some contamination of the cause fracture of the glass neck during cold further information are obtainable from alloy resulted when black steel pipe and weather) is done away with. Thus there the manufacturers. chlorine gas were combined at high is also uninterrupted access to the neck of temperatures. the bottle when pouring, so reducing Liquid rubber coating danger of spilling it is claimed. As an It was necessary to continue using black Thinned, sprayed on metal and then additional precaution, two 'rigid ' prongs steel pipe, because it was considered the stoved, Lorival R liquid depolymerised project downwards from the clamp over only practical metal that could be used natural rubber provides a coating that is and beyond the outside of the carboy. during the high-temperature fluxing opera­ claimed to be chemically resistant to almost tions. The problem was to find an enamel all corrosive agents. It is further claimed The usual chain or hinged bar across the that would successfully resist the corrosive that, when mixed with aluminium flake front of the carboy (which so often corrode conditions and high temperature. Best and treated in the same way, the resultant away) are made unnecessary. results were achieved by starting out with a paint finish will resist red heat. When the carboy has been placed in the corrosion-resistant finish and altering it to dropped base of the cradle and the sliding This liquid rubber, whose most im­ add high temperature resistance. clamp has been lowered into position, it is portant use, perhaps, is as a fluid casting It was also necessary to develop a satis­ virtually impossible it is claimed for the material, has just been introduced by factory method of coating the pipe with bottle or carboy to fall from the stand, United Ebonite & Lorival Ltd. It comes however far over they are tilted. ceramic on the inside as well as the outside. in two viscosities: R25, rated at 25,000 To keep the liquid enamel from washing This new safety device is made from poises, and the less viscous R5 at 5,000 off, one end of the pipe was sealed and the tubular steel and the sliding clamp has poises. Both are fluid at room temperature liquid enamel was allowed to fill the up­ and may be stored for long periods without powerful jaws that do not damage the right pipe and later run off slowly. After deterioration. handle. It is finished with two coats of the pipe was coated, it was fired at tem­ anti-corrosive paint. The two standard types are supplemented peratures of 1,300 to 1,900°F. This initial A typical model, SCT/22 (for 22-in. by a range of liquid rubber compounds coating supplies the bond between the diam. carboys), has the following dimen­ known as Lorival CR. Among applica­ metal and one of several additional coats. sions: height, including handle, 64 in.; tions of the CR compounds are: corrosion- After the ceramic coating is completed, width 28 in.; weight 54 lb. resistant pipe and drum linings and in the bend is made in the pipe. adhesives for rubber-to-metal bonding. It is marketed by Powell & Co. CORROSION TECHNOLOGY, September 1954 253 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

PRODUCT AND PROCESSES

Anti-Corrosion Methods and Materials , Volume 1 (7): 1 – Jul 1, 1954

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0003-5599
DOI
10.1108/eb018968
Publisher site
See Article on Publisher Site

Abstract

Corrosion proof motors Pumping corrosive fluids Composite welding stud A range of squirrel-cage induction A centrifugal pump—the Nobox—which To combat galvanic corrosion, a welding motors, designed for use in the corrosive is claimed to have excellent resistance to stud, half aluminium and half mild steel but non-explosive atmospheres found in corrosion has been developed by the has been developed in America. It is used Swedish company, Jonkopings Mekaniska chemical plants, plating shops, gas works, to attach aluminium roofing to metal Verkstad. The pump has no stuffing box salt works and oil refineries, incorporates rafters. The steel end is welded to the and has a liquid lock wheel with the sealing a fan of moulded phenol formaldehyde rafter, or purlin, and the aluminium end which is claimed to have withstood severe located entirely on the suction side. The is riveted to the roofing. durability and fatigue tests. The fan is pump is claimed to be absolutely tight and mounted on its shaft by a special method. to require no maintenance. It is vertically Porcelain saves steel pipe in Polyvinyl-acetal-covered wire is used for mounted and designed so that it is possible chlorine fluxing operation the stator winding. The windings are to dismantle the whole pump without impregnated with phenolic insulating var­ removing the motor or motor stand. The The service life of black steel pipes nish by dipping and baking them in an liquid handled by the pump can be used used in a chlorine fluxing operation was lengthened 12 to 20 times by coating the for sealing even if it contains large con­ automatic heat-controlled oven four times; piping inside and out with porcelain centrations or solids—up to 55 to 60%. this process is claimed to produce a finished enamel, according to an article in Chemical The makers point out that, since there is winding capable of high resistance to cor­ Processing. An estimated saving of more no packing to wear the shaft, the corrosion- rosive chemicals. The rating plate is made than 2 million lb. of pipe in 18 months was resistant surface that is sometimes applied from polyvinyl chloride. achieved. The cost of the coated pipe is to certain materials does not wear out. The motors are made to British Standard comparatively five times that of uncoated dimensions and are available for outputs New epoxide resin pipes. An additional advantage is that use up to 25 h.p. They are similar in appear­ of the coated pipe has eliminated the con­ ance to the normal totally enclosed, fan- A new type of epoxide resin now being tamination of the aluminium alloy through made by Leicester, Lovell & Co., Ltd., cooled machines. The English Electric Co. the dissolving of the iron. will further extend the use of this versatile Ltd. are the makers. class of resins. Applications range from The experiment was made at the works Anti-corrosive tilter for acid carboys the gluing of precious stones in their of the Reynolds Metal Co., Listerhill, settings to the manufacture of durable Alabama, U.S.A. In the fluxing operation A new device for the safe pouring of chemical-resistant structures with glass a bent pipe is held by the operator while acids from carboys embodies features which fibre reinforcement. it is poked through a hole in a furnace are claimed to make it less susceptible to containing molten aluminium. The bent corrosion than is usual with such equip­ Specific advantages claimed for the new end of the pipe is placed near the bottom ment. This tilter is in the form of a cradle epoxide resin (known as Epophen M-777), of the molten metal. Chlorine gas then designed with a dropped base so that the are absence of inconvenient exotherm even flows through the pipe and bubbles up bottom of the carboy lies within a circular in large masses, great strength and tough­ through the aluminium. Before coating, retaining ring. The sliding clamp attached ness of castings, and lower cost. the service life of the pipe was only 8 to to the tilting handle rests firmly upon the To facilitate initial small-scale testing by 10 min., owing to the effects of the chlorine top of the glass bottle (from which it is industrial users, a compact test kit has gas and molten aluminium at high tem­ insulated by heavy-gauge rubber tubing been brought out which provides suitable peratures. The temperature of the interior and the clamp does not touch the iron skip quantities of resin, catalyst and filler to­ of the molten aluminium ranged from or hamper at all. By this means the usual gether with complete instructions and 1,250 to 1,350°F., while the surface tem­ metal ring surrounding the neck of the equipment for measuring and mixing the perature of the bath frequently reached bottle (which so often corrodes, and may adhesive. This test kit (price 7s. 6d.) and 2,ooo°F. Also, some contamination of the cause fracture of the glass neck during cold further information are obtainable from alloy resulted when black steel pipe and weather) is done away with. Thus there the manufacturers. chlorine gas were combined at high is also uninterrupted access to the neck of temperatures. the bottle when pouring, so reducing Liquid rubber coating danger of spilling it is claimed. As an It was necessary to continue using black Thinned, sprayed on metal and then additional precaution, two 'rigid ' prongs steel pipe, because it was considered the stoved, Lorival R liquid depolymerised project downwards from the clamp over only practical metal that could be used natural rubber provides a coating that is and beyond the outside of the carboy. during the high-temperature fluxing opera­ claimed to be chemically resistant to almost tions. The problem was to find an enamel all corrosive agents. It is further claimed The usual chain or hinged bar across the that would successfully resist the corrosive that, when mixed with aluminium flake front of the carboy (which so often corrode conditions and high temperature. Best and treated in the same way, the resultant away) are made unnecessary. results were achieved by starting out with a paint finish will resist red heat. When the carboy has been placed in the corrosion-resistant finish and altering it to dropped base of the cradle and the sliding This liquid rubber, whose most im­ add high temperature resistance. clamp has been lowered into position, it is portant use, perhaps, is as a fluid casting It was also necessary to develop a satis­ virtually impossible it is claimed for the material, has just been introduced by factory method of coating the pipe with bottle or carboy to fall from the stand, United Ebonite & Lorival Ltd. It comes however far over they are tilted. ceramic on the inside as well as the outside. in two viscosities: R25, rated at 25,000 To keep the liquid enamel from washing This new safety device is made from poises, and the less viscous R5 at 5,000 off, one end of the pipe was sealed and the tubular steel and the sliding clamp has poises. Both are fluid at room temperature liquid enamel was allowed to fill the up­ and may be stored for long periods without powerful jaws that do not damage the right pipe and later run off slowly. After deterioration. handle. It is finished with two coats of the pipe was coated, it was fired at tem­ anti-corrosive paint. The two standard types are supplemented peratures of 1,300 to 1,900°F. This initial A typical model, SCT/22 (for 22-in. by a range of liquid rubber compounds coating supplies the bond between the diam. carboys), has the following dimen­ known as Lorival CR. Among applica­ metal and one of several additional coats. sions: height, including handle, 64 in.; tions of the CR compounds are: corrosion- After the ceramic coating is completed, width 28 in.; weight 54 lb. resistant pipe and drum linings and in the bend is made in the pipe. adhesives for rubber-to-metal bonding. It is marketed by Powell & Co. CORROSION TECHNOLOGY, September 1954 253

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Jul 1, 1954

There are no references for this article.