Abstract: Methods for on-line cleaning hot parts of a gas turbine during its operation are provided. A cleaning agent composition is injected into a hot gas path of the gas turbine, and includes a liquid carrier and a descaling material suspending in the liquid carrier. The descaling material includes at least one oxide, in an anhydrous or a hydrated form, that is derived from calcium, magnesium, titanium, iron, aluminium, silicon in the form of silicates having non-fibrous structures, or phosphorus in the form of alkaline-earth phosphates. Cleaning agents are also provided for use in a gas turbine.

Abstract: A particulate coke composition including expandable coke is capable of removing deposits from rotating parts of a gas turbine engine while under full fire or idle speed. The coke composition may be introduced directly into the combustion chamber (combustor) of the gas turbine or, alternatively, anywhere in the fuel stream, water washing system, or the combustion air system. By kinetic impact with the deposits on blades and vanes, the deposits will be dislodged and will thereby restore the gas turbine to rated power output. If introduced into the compressor section, the coke particles impinge on those metal surfaces, cleaning them prior to entering the hot gas section where the process is repeated.

Abstract: A method is disclosed for removing deposits from rotating parts of a gas turbine engine while under full fire or idle speed utilizing a particulate coke composition. The coke composition may be introduced directly into the combustion chamber (combustor) of the gas turbine or, alternatively, anywhere in the fuel stream, water washing system, or the combustion air system. By kinetic impact with the deposits on blades and vanes, the deposits will be dislodged and will thereby restore the gas turbine to rated power output. If introduced into the compressor section, the coke particles impinge on those metal surfaces, cleaning them prior to entering the hot gas section where the process is repeated.

Abstract: A method is disclosed for removing deposits from rotating parts of a gas turbine engine while under full fire or idle speed utilizing a particulate coke composition. The coke composition may be introduced directly into the combustion chamber (combustor) of the gas turbine or, alternatively, anywhere in the fuel stream, water washing system, or the combustion air system. By kinetic impact with the deposits on blades and vanes, the deposits will be dislodged and will thereby restore the gas turbine to rated power output. If introduced into the compressor section, the coke particles impinge on those metal surfaces, cleaning them prior to entering the hot gas section where the process is repeated.

Abstract: A cleansing composition is described. The cleansing composition generally contains an antimicrobial agent, a heating agent, and a thermochromic agent. During use, the heating agent heats the composition so that the antimicrobial agent becomes more effective. The thermochromic agent, on the other hand, changes the color of the composition as it is heated in order to indicate to a user that the composition is at a desired temperature. In an alternative embodiment, instead of containing a heating agent, a heating source can be used to heat the composition. The heating source can be, for instance, an electrical resistance heater.

Abstract: Compositions that include a detergent composition and an active metal compound are described wherein the detergent composition includes a quaternary ammonium salt detergent and optionally an oxygen-containing detergent, and wherein the active metal compound is in the form of a colloidal dispersion, comprising an organic phase, particles of an iron compound in its amorphous form, and at least one amphiphilic agent. These compositions can be used in fuels to provide improved engine performance by, for example, reducing fuel injector fouling in the engine and/or by improving the regeneration of the engine's particulate exhaust trap.

Abstract: A process for forming a coated substrate comprises providing a nickel base alloy substrate, depositing a chromium coating onto the nickel base alloy substrate and diffusing chromium from said coating into the substrate, applying a MCrAlY coating onto the nickel base alloy substrate and heat treating the substrate with the deposited chromium and the MCrAlY coating so that chromium diffuses into an outer region of the substrate. Further, in accordance with the present invention, a strip process for removing a coating from a substrate broadly comprises the steps of providing a nickel base alloy substrate having chromium diffused into an outer region and a MCrAlY coating deposited over the substrate with the diffused chromium and removing the MCrAlY coating by immersing the nickel base alloy substrate in an acid solution containing a sulfuric acid—hydrochloric acid mixture in water.

Abstract: Methods are provided for cleaning a component having internal passages. A method includes contacting the component with an aqueous hydrogen fluoride solution without agitating the solution for a time period in a range of about 20 minutes to about an hour to dissolve a solid piece of blockage material blocking at least a portion of the internal passages, the aqueous hydrogen fluoride solution comprising, by volume, about 40 percent to about 60 percent hydrogen fluoride and optionally, a corrosion inhibitor, and the blockage material comprising a silicate and rinsing the component with water to remove at least a portion of the aqueous hydrogen fluoride solution from surfaces of the component defining at least a portion of the internal passages.

Abstract: Solid cleaning products suitable for use as a floor cleaner are disclosed. Methods of making and using solid cleaning products are also disclosed.

Abstract: A method and cleaning composition for removing engine deposits from turbine components, in particular turbine disks and turbine shafts. This method comprises the following steps: (a) providing a turbine component having a surface with engine deposits thereon, wherein the turbine component comprises a nickel and/or cobalt-containing base metal; and (b) treating the surface of the turbine component with a cleaning composition to convert the engine deposits thereon to a removable smut without substantially etching the base metal of the turbine component. The cleaning composition comprises an aqueous solution that is substantially free of acetic acid and comprising: a nitrate ion source in an amount, by weight of the nitrate ion, of from about 470 to about 710 grams/liter; and a bifluoride ion source in an amount, by weight of the bifluoride ion, of from about 0.5 to about 15 grams/liter.

Abstract: For decades the slow accretion of carbonaceous deposits on the upper cylinder areas of the internal combustion engines has acted to impair optimum performance and to significantly reduce gasoline or Diesel mileage per gallon. It has now been discovered that these formerly rather intractable engine deposits can be efficiently removed by dispersing and dissolving them through the use of optimized mixtures of polar protic and dipolar aprotic solvents that have the essential capability of acting in concert synergistically. For practical reasons these solvents must have a melting point higher than about 41° F. (5° C.). The finished product must also have a dielectric constant of about 20 and a pH value of at least 11.0 at 77° F. (25° C.). These parameters are considered vital to success. For example, in a test using a blend with a dielectric constant of 15, the removal of the carbonaceous deposits was either de minimus or very limited, even at pH values of 12.0 at 77° F. (25° C.) or higher.

Abstract: Methods and compositions for on-line cleaning of internal surfaces of selected sections of a hydrocarbon fuel burning gas turbine and associated heat recovery equipment, during operation. Cleaning solutions containing graphite and/or molybdenum-based particles and oil soluble corrosion inhibitors, aromatic solvents, and surfactants are selectively introduced directly into the combustion chamber (combustor) of the gas turbine, into the fuel stream, water washing system, or the combustion air system (hot gas path). The cleaning process dislodges unwanted ash deposit buildup and, thereby restores the gas turbine to rated power. When introduced into the compressor section, the particles impinge on the metal surfaces, cleaning them prior to entering the hot gas section where the process may be repeated. They may also be carried through the exhaust to additionally clean attendant heat recovery equipment, if present.

Abstract: A decarbonization formulation for removing carbon deposits and the like, and method of application therefore. The preferred embodiment of the present invention teaches a method for removing carbon deposits from an internal combustion engine and composition therefore wherein there is utilized a solution comprising water and glycol ether based brake fluid in about a 50/50 ratio. The preferred brake fluid utilized in the present invention is H-121 Premium Plus Brake Fluid by Cooper Industries, Wagner Brake Division of St. Louis, Mo. The solution is chilled to about 40-50 degrees and about one pint is added in liquid form to the air intake with the engine running at about 2000 rpms over a period of about one minute. The concentration, temperature of the fluid, and rate of application can vary depending upon the size and type of engine.

Abstract: In a method for cleaning an engine component, an engine component is provided and is immersed in an acid solution selected from phosphoric acid, citric acid and acetic acid. A cleaning composition for an engine component comprises an agitated acid solution selected from phosphoric acid, citric acid and acetic acid.

Abstract: A treatment solution (2) containing fluoride is added to a cleaning solution (1) drained from a cleaning tank (11). Fluoride is allowed to react with fluorosilicic acid in the cleaning solution to settle a precipitate (4) containing fluorosilicate, and the precipitate (4) is removed. The cleaning solution regenerated in a regeneration apparatus (10) is again returned to the cleaning tank (11), and used as a cleaning solution for a CRT panel (20).

Abstract: A composition for rinsing a memory hard disc, which comprises water and an additive selected from the group consisting of an oxo-acid, an oxo-acid salt and a chloride.

Abstract: A cleaning, polishing, and reconditioning composition of matter for internal parts of an engine, particularly suited for a cylinder of an internal combustion engine, composed of abrasive powder, chemical compositions of non-ferrous metals including nickel, sodium, cobalt, and molybdenum, and a carrier substance, which is either a dense liquid or has capacity of liquefying at temperatures existing within said engine.

Abstract: Compositions useful for polishing wafers to be used in microelectronic devices comprise silicon dioxide, aluminum oxide, sodium hydroxide, and water. Cleaning compositions for removing electron wax from wafers to be used in microelectronic devices comprise from about 2 to about 6 percent by weight of ammonium hydroxide, from about 10 to about 22 percent by weight of hydrogen peroxide, and water.

Abstract: A composition and method for the removal of ionic salt deposits from a surface using an organic solvent of low polarity and a complexing agent. The complexing agent is chosen from a group which includes podands, cryptands, and coronands. The method provides nearly complete removal of ionic salt deposits with a single washing of the surface with the low polar cleaning mixture.