33results about How to "Uniform passivation" patented technology

A nebulization system, which creates a uniform fog of tiny suspended liquid droplets, to lubricate the surfaces of MEMS devices. These droplets fall over the edge of a baffle and are then mixed with an umbrella-like sheet of N₂ turbulation gas to generate a uniform cloud of droplets that fill a passivation chamber. The MEMS device is then positioned in this uniform cloud of lubricant droplets for a specified amount of time, thereby uniformly lubricating all the surfaces of the device. The system uses a laser monitoring approach to control the uniformity of the lubricant cloud by providing feedback to the system to control the flow of gases. The system also equalizes the pressure around the sample device seal to prevent gases from entering or exiting the chamber and thereby influencing the environment inside the chamber.

The invention relates to a method for improving corrosion resistance of a 1Cr17Ni2 martensitic stainless steel fastener. The method comprises the following steps that 1) electric polishing is conducted, the 1Cr17Ni2 martensitic stainless steel fastener is immersed in an electric polishing solution for electric polishing treatment, and cleaning is conducted for later use after the treatment; 2) passivation is conducted, the fastener after the electric polishing treatment is immersed into a passivation solution for passivation treatment, and cleaning and drying are conducted for later use afterthe treatment; and 3) sealing is conducted, the fastener after the passivation treatment is immersed in a sealed liquid for sealing treatment. According to the method, the 1Cr17Ni2 martensitic stainless steel fastener is subjected to the electric polishing treatment, the passivation treatment and the sealing treatment, so that the surface smoothness of the fastener is effectively improved, the uniformity and compactness of a passivation film layer are improved, the defects of a traditional process are eliminated, the salt mist resistance test time of the fastener reaches 48 hours or above, andthe corrosion resistance of the corresponding fastener is remarkably improved.

The invention discloses a ferrous sulfide gas phase passivation device. The gas phase passivation device contains a steam supply part, an oxygen supply part and a sealing part. The gas phase passivation device is connected with a tail gas treatment device and a data analysis device respectively to perform gas phase passivation to a petrochemical device. The steam supply part contains a water softener, a steam generator, a steam flowmeter and an oxygen valve. The oxygen supply part contains a compressed oxygenized air bottle, a gas flowmeter, an oxygen inlet valve and an oxygen valve. The sealing part contains a packed tower, a tail gas valve and a gathering tank valve. Compared with the liquid phase passivation method in the prior art, the phase passivation method of the invention mainly uses oxygenized air, is convenient to use and has lower cost. Waste gas is easy to treat. The waste gas which is easily treated through gas phase passivation can meet the emission standard. The treatment time is short; and passivation can be performed evenly and the channeling phenomenon does not exist.

The invention discloses a tin plate passivation solution and a passivation process. The passivation solution comprises the following composition according to mass concentration: 30-40g/L of fluorotitanate ion, 30-40g/ L of fluorozirconate ion, 10-20g/L of permanganate ion, 2-3ml/L of hydrofluoric acid, 5-15g/L of phosphate, 5-8g/L of organosilane, and the rest of water.

The invention relates to a passivation technology of cast steel for a chemical pump. The passivation technology comprises the following steps that (1) cast steel is cast into the required shape, then the surface of a cast piece is ground, and the cast piece is subjected to soaking treatment with a sodium carbonate solution of which the mass fraction is 1.5% for 2h, during which the surface of the cast piece is brushed by using a banister brush; (2) pickling is carried out; and (3) passivation treatment is carried out. The passivation technology of cast steel is simple; through carrying out cleaning, pretreatment and pickling treatment before passivation, the passivation effect is improved, the passivation is more uniform, and the density of a passivation layer is high; and the corrosion resistance of the cast piece can be improved greatly.

The invention discloses a gas-phase passivation system for a petrochemical device. The gas-phase passivation system comprises a gas-phase passivation device, a tail gas treatment device and a data analysis device, wherein the tail gas treatment device is connected with the gas-phase passivation device and is used for treating harmful gases generated in a passivation process; the tail gas treatment device further comprises a lye tank in which 10 percent sodium hydroxide solution is accommodated, a tail gas valve and an exhausting valve; the data analysis device is connected with the gas-phase passivation device and is used for detecting data of combustible gases before gas-phase passivation and linearly detecting the concentration of sulfur dioxide (SO2) generated by passivation in a gas-phase passivation process; and the data analysis device further comprises a gas drying apparatus, a gas chromatograph, a metering machine, an air inlet monitoring valve and an air outlet monitoring valve. By the passivation system, waste gases are easy to treat, and the waste gases generated by gas-phase passivation can meet the discharge standard after being treated simply.

The invention discloses a preparation method of modified anti-felting wool fiber. The method particularly comprises the following steps that 1, an oxidative antibacterial solution is prepared; 2, theoxidative antibacterial solution is added into a stirring tank, water bath heating is conducted to reach 40-45 DEG C, and the wool fiber is poured into the stirring tank; 3, compound enzymatic hydrolysate is prepared; 4, the wool fiber processed in step 2 is soaked in the compound enzymatic hydrolysate, and a normal temperature enzymatic hydrolysis reaction is conducted; 5, a chitosan solution isprepared and added into the stirring tank, the wool fiber prepared in step 4 is added, stirring is conducted for 5 h and then fished out, and then air-drying is conducted at normal temperature. Accordingly, the wool fiber is oxidized, protein of the wool fiber is exposed, the exposed protein is subjected to enzymolysis through protease, by means of enzymolysis, negative ions on the surface of thewool fiber are increased, chitosan is adsorbed to the surface of the wool fiber conveniently, and the texture is soft while the wool fiber anti-felting property is improved.

The invention relates to a double-laser derusting method. The double-laser derusting method comprises the following steps that cleaning derusting is conducted on a rusted contamination layer of a to-be-processed portion of metal electrical equipment through a pulse laser device with the wave length being 10.6 [mu]m; after cleaning derusting is completed, the to-be-processed portion is subjected touniform passivation through a passivation laser device with the wave length being 1.06 [mu]m, and a compact oxidation film layer is formed on the to-be-processed portion. The double-laser derusting method can conduct short-time efficient derusting on the corroded rusted electrical equipment and conduct uniform passivation on the surface of the equipment to delay metal corrosion.

The invention provides a method for passivating heavy metal contaminated soil. The method comprises the following steps of performing passivation construction: sequentially performing passivator spreading, rotary tillage, pulping, first standing and first draining on the heavy metal contaminated soil; and performing redundant passivator removal: performing flood irrigation until the water surfaceis higher than the earth surface of the passivated soil, and performing second standing and second draining. Rotary tillage mixing in an oxidation environment and pulping mixing in a reduction environment are cooperatively performed, so that the construction efficiency is improved, and the reaction of a passivator and heavy metal is promoted; meanwhile, redistribution of the passivator and balanced passivation of the contaminated soil are promoted; after the passivation construction, namely the sufficient reaction of the passivator, the flood irrigation is carried out until the water surface is higher than the earth surface of the passivated soil, and standing is carried out, so that redistribution work of the passivator and the balanced passivation of the contaminated soil can be effectively promoted; and finally the redundant passivator is removed from an area with the relatively low contamination degree (few passivators are needed) through drainage, so that the soil is effectively repaired, and the passivation effect and the crop yield are improved.

The invention relates to passivation treatment equipment, in particular to electroplated part treatment equipment. The technical problem to be solved is to provide the electroplated part treatment equipment which can tightly and stably press an electroplated part and can prevent a passivation solution from splashing. The electroplated part treatment equipment comprises a circulating box, an injection pipe, a discharge pipe, a first mounting rod and the like, an injection pipe is connected to the rear side of the upper part of the circulating box, a discharge pipe is connected to the front side of the lower part of the circulating box, and first mounting rods are symmetrically connected to the left and right sides of the lower part of the circulating box. According to the passivating device, a driving gear moves up and down, is meshed with a rack, drives a swing rod to rotate alternately in the positive and negative directions and is matched with a wedge-shaped plate, so that a passivating frame is finally pushed to swing back and forth in a reciprocating manner, the effect of uniformly passivating an electroplated part is achieved, and the passivating quality of the electroplated part is improved; the first pressing plate and the second pressing plate are fixed to the passivation frame, so that the electroplated part is pressed and limited, and the effect that the electroplated part is pressed in the passivation frame can be achieved.

The invention discloses a post-treatment process of a high-gloss formed cutter. The post-treatment process comprises the following steps that a cutter hole is formed in the center of a clamp, the part, directly participating in polishing, of the clamp is arranged to be in a cutter profile shape according to distribution of cutter edges, it is ensured that the distances between all the positions ofthe cutter and the clamp are equal, and four evenly-distributed pressure relief holes are additionally formed in the clamp; an abrasive material for cutter fluid polishing is made of a macromoleculesemi-solid carrier and abrasive grains in a mixed configuration mode according to the ratio of 3:2; and the fluid polishing process is conducted through the steps that (1) a power switch of a polisheris turned on, the configured abrasive material for cutter fluid polishing is put into a lower cylinder of the polisher, the clamp is fixed to a worktable, and the to-be-passivated cutter is fixed tothe clamp; (2) the polishing time and the abrasive material pressure are set, a machine is started, pistons in an upper cylinder and the lower cylinder make reciprocating movement at a constant speed,thus the abrasive grains flow through the cutter and edge openings uniformly, and polishing passivation is completed; and (3) after being polished, the cutter is taken out, and replaced with a new to-be-polished cutter. Overall force bearing is uniform and constant, the passivation effect is ensured, and the passivation time is saved.