87results about How to "Corrosion control" patented technology

A fuel cell system, which may be powering a vehicle propulsion system (159), includes a fuel cell power plant having a stack (151) including a plurality of fuel cells (12), each having a cathode (19) and anode (17) separated by a membrane (16), and an air pump (174) connected to reactant air flow fields through a diverter valve (172). A controller (185) is responsive to normal and high demand to cause the diverter valve to allow air to flow from the pump to the reactant air flow fields, and is responsive to low demand to cause said diverter valve to divert air directly into ambient so that it does not reach the cathode, thereby to reduce open circuit voltage conditions that promote degradation of the cathode, and to prevent excessive performance decay. An auxiliary load (220) can be in the diverted air flow, either ahead of or after the diverter valve. Energy storage (200, 201) works with the vehicle propulsion system.

The invention provides a chemo-mechanical polishing slurry for copper, and its application. The slurry comprises abrasive particles, a complexing agent, an oxidant, a corrosion inhibitor, and at least one organic phosphate surfactant. The slurry has the advantages of maintenance of a high copper removal rate, improvement of the saucerization and the over polishing window of polished core wires, few pollutants the surface of polished copper, and no corrosion.

The invention provides an application of an organic phosphate surfactant in self-stopping polishing. The organic phosphate surfactant has the advantages of maintenance of a high copper removal rate, improvement of the saucerization and the over polishing window of polished copper wires, few pollutants on the surface of polished copper, no corrosion and the like.

Disclosed is a corrosion control method for annular space tubing and casings of an oil field water injection well. A construction technology comprises the steps of cleaning dirt on walls of the annular space tubing and casings up by an A agent or B agent formula, then, feeding a corrosion control treating agent with a certain concentration into annular spaces, and cleaning the annular spaces again and replacing the corrosion control treating agent after a period to protect the walls of the tubing and casings against corrosion for a long time. According to the corrosion control method, corrosion of annular space media to the tubing and the casings is reduced substantially, service lives (life)of the tubing and the casings of the water injection well can be prolonged by more than one time, the cost is low, the construction technology is simple and convenient, and effective technical support is provided for high yield and stable yield of oil fields.

The present invention relates to the field of water treatment, and discloses a method for treating sulfur-containing circulating cooling water. The method comprises: adding a chlorine-containing oxidizing agent and a composite corrosion inhibitor to sulfur-containing circulating cooling water, and controlling the total alkalinity of the sulfur-containing circulating cooling water at 100-200 mg/L, wherein the residual chlorine in the sulfur-containing circulating cooling water is 0.1-0.8 mg/L with the use amount of the chlorine-containing oxidizing agent, and the composite corrosion inhibitor contains a water-soluble zinc salt, an organic polymer type water treatment agent, and a phosphorus-containing corrosion inhibitor. According to the present invention, by controlling the total alkalinity and the residual chlorine and pouring the specific kind of the composite corrosion inhibitor in the matched manner, the corrosion of the sulfur-containing circulating cooling water can be effectively controlled, the carbon steel corrosion rate meets the technical requirement of less than 0.1 mm/a, and the carbon steel test tube adhesion rate meets the technical requirement of less than 20 mg/(cm2.month); and although the composite corrosion inhibitor containing the water-soluble zinc salt is used, the zinc salt deposition cannot cause the over-standard of the adhesion rate, such that the system does not require the complete replacement after the sulfur-containing material leaks so as to reduce the energy consumption.

The invention provides optical glass which is excellent in interior quality and has excellent transmittance and anti-devitrification property. The optical glass comprises the components in percentages by weight: positive ion: 8-25% of P<5+>, 5-20% of Al<3+>, 20-50% of Ba<2+>, 15-40% of Sr<2+>, 0.5-8% of Mg<2+>, 1-10% of Ca<2+>, 0-10% of La<3+>, 0-10% of Gd<3+> and 0-10% of Y<3+>; negative ions: 40-90% of F<-> and 10-60% of O<2->. Through a reasonable formula design, the optical glass has the excellent interior equality, transmittance and anti-devitrification property while has the refractive index of 1.48-1.58 and the abbe number of 75-83.

The invention discloses a preparation method of a corrosion inhibitor for inhibiting corrosion of supercritical CO2 to low-carbon microalloyed steel, belonging to the field of corrosion resistance. The preparation method comprises the steps of firstly, adding higher fatty acid into a three-neck flask provided with a condensation and reflux device, a water separator and an S-shaped condensation pipe, vacuumizing, replacing N2 2-4 times, adding a proper amount of polyethylene polyamine and a water-carrying agent under the protection of N2 gas, and heating until the reaction enters an acylation stage; then, continuing to heat to a cyclodehydration temperature after the acylation reaction is ended, and heating until the reaction is ended; carrying out reduced pressure distillation to remove redundant water-carrying agent and water in the product, and recrystallizing to obtain the corrosion inhibitor imidazoline. An imidazoline derivative is prepared through the steps of reacting for 3h while continuously stirring imidazoline and benzyl chloride at the temperature of 50-90 DEG C according to the molar ratio of 1:1.1; after the reaction is ended, adding thiourea with the same molar weight as imidazoline, heating to 90-110 DEG C, continuously stirring and reacting for 1.5-2h. The corrosion inhibitor is low in dosage, free of pollution, simple in production, incapable of injuring human bodies and capable of effectively controlling the corrosion of supercritical CO2 to low-carbon microalloyed steel.

The invention relates to the field of crude oil storage and transportation, in particular to a treatment system and method for dehydration and desalination of crude oil. The treatment system for dehydration and desalination of the crude oil comprises a crude oil storage tank and a backflow pipeline, wherein the two ends of the backflow pipeline are both communicated with the bottom of the crude oil storage tank to form a closed loop, and the backflow pipeline is provided with a delivery pump; the backflow pipeline is provided with an injection port of a demulsifying agent and a corrosion inhibitor. According to the method for dehydration and desalination of the crude oil, the crude oil storage tank is used for separating oil and water in the crude oil; the discharged water is circularly conveyed into the crude oil storage tank, and oil and water separation is carried out again; in the backflow process, an appropriate quantity of demulsifying agent and corrosion inhibitor are added, desalination and dehydration of the crude oil are carried out better through a certain water discharge temperature and standing time, and the pressure of a downstream water treatment unit is reduced. Themethod has the advantages that the technological requirements are simple, field construction is easy, and the method is convenient and fast.

An inhibitor which can control the corrosion of the galvanic couple is made up of the aliphatic polyoxyethylene ether 1-70%; the propiolic alcohol 0.01-30%; the water 0-70%; diaminoethane 0-30%; the ethanol 0-70%. It has the good effect of controlling the corrosion of the galvanic couple.

The invention relates to a corrosion inhibitor and a preparation method thereof. The corrosion inhibitor comprises, by weight: 50-70% of Mannich base, 10-20% of phosphate, 10-20% of isopropanol, and 10-20% of sodium molybdate. The preparation method of the corrosion inhibitor comprises: adding N-methylaniline into a three-neck flask, heating the flask to 80 DEG C, and adjusting the pH value to 2 with concentrated hydrochloric acid; heating the flask to 95 DEG C, adding acetone into the flask, and heating the flask to 150 DEG C; adding formaldehyde and benzaldehyde into the flask, maintaining the temperature at 150 DEG C, and performing reflux for 4h while performing stirring to obtain Mannich base; and compounding, by weight, 50-70% of Mannich base, 10-20% of phosphate, 10-20% of isopropanol, and 10-20% of sodium molybdate to prepare the corrosion inhibitor. The corrosion inhibitor can be used at a high temperature of 180 DEG C. When the concentration of the corrosion inhibitor is 100 ppm, an N80 iron sheet is corroded by stratum water of the Tahe Oilfield for 6h at 180 DEG C, and the corrosion inhibition rate is 90.04%.