Abstract: Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20% by weight of ethylene, b) 80 to 98% by weight of propylene; c) 50 to 99% of rr triads; and d) Mw (LS) of 10 to 250 kg/mol.

Abstract: A tire grinding apparatus includes at least one support arm pivotally connected to a base. A pair of grinding wheels are rotatably carried by the support arm and are adapted to engage the outer surface of a tire. The grinding wheels are disposed such that one of the grinding wheels is a leading grinding wheel and the other is a trailing grinding wheel. The grinding wheels rotate in opposite directions. The grinding wheels are partially disposed in a hood that is in fluid communication with a vacuum source. A source of pressurized air is in fluid communication with a blower head that is disposed between the grinding wheels such that it directs pressurized air against the surface of the tire being ground. The pressurized air removes dust from the tread grooves and sipes of the tire where it is collected by the hood and removed from the hood from the vacuum system. The position of the trailing wheel is adjustable with respect to the leading grinding wheel and the support arm.

Abstract: Described is an aqueous electroless alkaline pH tin coating composition comprised of a source of tin ions and an effective amount of a sludge control agent that is an organic chelating composition.

Abstract: Described is an aqueous electroless alkaline pH tin coating composition comprised of a source of tin ions and an effective amount of a sludge control agent that is an organic chelating composition.

Abstract: A high lubricity codeposit of zinc and graphite, and an improved method for depositing the codeposit, is disclosed. The coating is characterized by a coefficient of friction equal to or less than 0.130, and a high resistance to corrosion evidenced by no red rust in a salt spray environment for 72 hours and no destruction due to corrosion in an industrial environment, containing sulphur dioxide, for four months. When the codeposit additionally has a chromate outer coating, the system has a coefficient of friction equal to or less than 0.112 and has no red rust in a salt spray environment for at least 120 hours. The codeposit is applied by immersing a cleansed metallic substrate in an acidic zinc plating electrolyte containing at least 40 g/l zinc ions and 30-110 g/l insoluble bulk graphite, with a pH of 5-5.7.

Abstract: An aluminum article is cleaned to prepare it for plating by soaking it in an aqueous solution containing sodium metasilicate, sodium pyrophosphate and sodium tetraborate at 140.degree.-180.degree. F. The article is then washed by a power spray of a second solution, constituted the same as the first cleaning solution, at 110.degree.-130.degree. F. The article is subsequently rinsed with water and immersed in an aqueous nitric acid solution.

Abstract: An improved air gap baffle is disclosed for a dynamoelectric machine of the type having an air-tight casing filled with a cooling gas, a stator core, a rotor defining an air gap with the stator core, and a means for recirculating the cooling gas through the stator core and the rotor. The baffle is an annular member which is disposed in the air gap between the stator core and the rotor for defining air gap zones having different cooling gas pressures and/or gas flow in opposing directions. The baffle comprises a flexible abradable member having a serrated tip in sealing relationship with the rotor. The baffle improves sealing between adjacent air gap zones by minimizing running clearances and by providing a labyrinth seal. The flexible nature of the baffle reduces the possibility of damage to either the baffle or the rotor during assembly and thereby allows the dynamoelectric machine to be assembled with minimal running clearances between the baffle and the rotor.

Abstract: A plated aluminum product, and the method of making such product is disclosed for use in automotive bumpers. A plated outer decorative coating is used and is preferably constituted of chromium (0.000005-0.00005" thick) on nickel (0.0003-0.003" thick). An electroplated pretreatment system is employed between the outer decorative coating and aluminum alloy and consists essentially of at least a brass strike containing, for purposes of increased lateral corrosion resistance, an as-deposited copper content in the range of 60-75% by weight, and the aluminum substrate should preferably be restricted to a zinc content of 4.5-5.5%. The pretreatment system may be expanded to include a copper layer encased in two layers of brass, a first layer most adjacent the aluminum substrate containing said 60-75% copper and a second brass layer most adjacent the decorative coating containing 50-60% copper.

Abstract: A plated aluminum product, and the method of making such product is disclosed for use in automotive bumpers. A plated outer decorative coating is used and is preferably constituted of chromium (0.000005-0.00005" thick) on nickel (0.0003-0.003" thick.) An electroplated pretreatment system is employed between the outer decorative coating and aluminum alloy and consists essentially of at least a brass strike containing, for purposes of increased lateral corrosion resistance, an as-deposited copper content in the range of 60-75% by weight, and the aluminum substrate should preferably be restricted to a zinc content of 4.5-5.5%.The pretreatment system may be expanded to include a copper layer encased in two layers of brass, a first layer most adjacent the aluminum substrate containing said 60-75% copper and a second brass layer most adjacent the decorative coating containing 50-60% copper.

Abstract: A method of treating an aluminum article prior to plating by first cleaning the article to be substantially free of aluminum oxide and then immersing the article in a solution containing sodium hydroxide, sodium metasilicate, trisodium phosphate and sodium carbonate.

Abstract: A cost saving method for protecting an engine element against operation galling and corrosion is disclosed. The element, particularly a piston, is cast of aluminum and cleaned free of dirt and organic matter. A warm stream of an aqueous solution containing a protective metal agent is directed onto a selected zone of the element. The agent consists essentially of potassium stannate and the zone is preferably the middle region of a piston skirt extending from the upper skirt periphery to lower skirt extremity (tail). The stream is maintained as a laminar flow as it traverses the selected zone. An ultra-thin protective coating is adherently deposited on the zone of the piston.

Abstract: A method is disclosed for preparing a coated rotor housing useful in a rotary internal combustion engine. A first mandrel is defined from conductive material such as a chrome-bearing steel. The outer surface of the first mandrel is shaped to be the mirror image of the resultant internal surface of the rotor housing; the first mandrel material is passivated preferably by the use of boiling water to form a chrome oxide material on the outer surface to prevent adhesion of surrounding coated materials. A thin, composite-particle wear-resistant coating is electrolytically deposited on to the first mandrel to form an assembly. The wear-resistant coating is preferably comprised of nickel carrying embedded silicon carbide particles. The first mandrel is stripped from the deposited thin coating leaving a self-supporting liner or sleeve, the liner may be used in its unitary form or may be sliced into smaller liner bands for separate processing.