Abstract:
A method for adjusting pH of an aqueous solution during a processing event that includes the addition of urea sulfate to the solution in the presence of a corrosion inhibitor. The processing event can be relating any number of applications, including but not limited to, textile, paper, agricultural, metals, and water applications.
Abstract:
A methods of the present invention for inhibiting silica scale formation and corrosion in aqueous systems where soluble silica residuals (SiO2) are maintained in excess of 200 mg/L, and source water silica deposition is inhibited with silica accumulations as high as 4000mg/L (cycled accumulation) from evaporation and concentration of source water. The methods of the present invention also provides inhibition of corrosion for carbon steel at corrosion rates of less than 0.3 mpy (mils per year), and less than 0.1 mpy for copper, copper alloy, and stainless steel alloys in highly concentrated (high dissolved solids) waters. The methods of the present invention comprise pretreatment removal of hardness ions from the makeup source water, maintenance of electrical conductivity, and elevating the pH level of the aqueous environment. Thereafter, specified water chemistry residual ranges are maintained in the aqueous system to achieve inhibition of scale and corrosion.
Abstract:
Procédé de traitement d'un circuit d'eau sanitaire, comprenant l'injection d'un produit de traitement comprenant des silicates dans de l'eau circulant dans ledit circuit pour former un film sur les surfaces intérieures dudit circuit, caractérisé en ce que l'injection du produit de traitement comprend au moins une étape d'injection de silicates à une concentration entre 100 et 200Ό00 milligrammes par litre (mg/L) dans l'eau circulant dans ledit circuit pendant une durée entre 10 minutes (min) et 24 heures (h), le débit d'eau circulant dans le circuit étant ajusté dans une gamme entre 0.05 et 100 litres par minute (L/min) et la température d'eau circulant dans le circuit étant ajusté dans une gamme entre 40 et 65 °C.
Abstract:
Gegenstand der vorliegenden Erfindung ist eine wässerige Zusammensetzung zur Vorbehandlung einer metallischen Oberfläche vor einer weiteren Beschichtung oder zur Behandlung jener Oberflächen, wobei die wässerige Zusammensetzung dadurch erhalten wird, dass zu Wasser a) mindestens Natrium-, Kalium- und/oder Ammoniumwasserglas und b) mindestens ein Silan zugegeben werden, wobei das Mengenverhältnis von a) zu b) jeweils einschließlich der hieraus entstehenden Reaktionsprodukte vorzugsweise im Bereich von 0, 1 : 1 bis 2 : 1 liegt.
Abstract:
An anticorrosion ferrite-based pigment, derived from a hydrometallurgical purification process of EAF dust. EAF dust is generated in an electric arc furnace for carbon steel production by processing scrap metal, direct reduced iron and/or pre-reduced hematite, and using CaO-rich slag; from a condensation reaction of metals vapours of Fe, or Zn and of Mn, Mg, Si and/or Al, and suspended CaO particles and oxygen. The pigment contains a non-toxic amount of lead, and includes condensed metal oxides, comprising ferrites MOFe2θ3, M being Zn, Fe, Mn and Mg, and combinations thereof. The condensed oxides have ferrite structures preserved from the EAF dust, and form aggregates thereof. The pigment includes CaO entrapped by the ferrite structures and being partially available to react with humid air and/or water to protect the substrate against corrosion. The pigments are coated or uncoated. They are used for antifouling or paint formulations.
Abstract:
The invention relates to a system comprising a silicate and a base which is a gas at room temperature, for inhibiting corrosion from aqueous based formulations within aerosol containers. In particular for tin-plated aerosol canisters and in particular aerosol canisters containing aqueous alkaline aerosol formulations.
Abstract:
An environmentally benign and water dispersible corrosion inhibitor is disclosed. The corrosion inhibitor comprises a combination obtained by combining at least one of water dispersible polymers, water soluble silicates, water, additives, among other components.
Abstract:
A method for the removal of hydrogen sulphide from a hydrocarbon-water mixture. The method utilizes a sulphite or a bisulphite, preferably ammonium bisulphite. It may be added as a salt or in solution. It is used in amounts by weight of from 2:1 salt : hydrogen sulphide.
Abstract:
An anti-fretting rust preventative solution includes a rust preventative fluid and an anti-fretting additive dissolved in the rust preventative fluid. The anti-fretting additive includes at least one compound that is surface-active with steel to produce a low-shear velocity accommodation layer in a metal-to-metal interference fit. The anti-fretting rust preventative solution can be provided in a bearing assembly with metal-to-metal interference fits, as well as other applications where fretting wear may otherwise occur.