585 results about "Atmospheric corrosion" patented technology

An electrochromic variable reflectance mirror for a vehicle includes a reflector/electrode on the third surface of the mirror. This reflector/electrode forms an integral electrode in contact with the electrochromic media, and may be a single layer of a highly reflective material or may comprise a series of coatings. When a series of coatings is used for the reflector/electrode, there should be a base coating which bonds to the glass surface and resists any adverse interaction, e.g., corrosive action, with the constituents comprising the electrochromic media, an optional intermediate layer (or layers) which bonds well to the base coating and resists any adverse interaction with the electrochromic media, and at least one highly reflective layer which directly contacts the electrochromic media and which is chosen primarily for its high reflectance, stable behavior as an electrode, resistance to adverse interaction with the materials of the electrochromic media, resistance to atmospheric corrosion, resistance to electrical contact corrosion, the ability to adhere to the base or intermediate layer(s) (if present) and to the epoxy seal, and ease of cleaning. If a base layer is deposited it preferably covers the entire third surface; however, when this is done the highly reflective layer may optionally only coat the central portion of the third surface and not the perimeter edge portion. The third surface reflector/electrode provides of improved electrical interconnection techniques used to impart a voltage drive potential to a transparent conductor on the mirror's second surface.

A weather resistant thick steel plate comprises, by weight, 0.06%-0.9% of C, not more than 0.30% of Si; 1.10%-1.50% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.035%-0.065% of Als, 0.25%-0.50% of Cu, 0.20%-0.50% of Ni, 0.40%-0.70% of Cr, 0.50%-0.15% of Mo, 0.008%-0.018% of Ti, 0.030%-0.060% of V, 0.015%-0.030% of Nb, not more than 0.0055% of N, 0.001%-0.004% of Ca, 0.0004%-0.0010% of selectively added B, and the balance of Fe and unavoidable impurities. The manufacturing method includes deep desulfurization of molten iron, converter smelting, LF, RH, continuous casting, on-line finishing of slabs, cut-to-length torch cutting of slabs, heating, TMCP, and slow cooling of steel plates. The obtained weather resistant thick steel plate has balanced strong toughness and strong plasticity, low yield ratio, atmospheric corrosion resistance, excellent weldability and fatigue resistance, and is especially applicable to non-coating high-rise building structures and bridge structures.

The invention relates to high strength easily forming atmospheric corrosion resistant steel. The invention provides the high strength easily forming atmospheric corrosion resistant steel aiming at the problems in existing steel that the weatherability is bad and the service life is lowered under the condition that the thickness is thinned. The high strength easily forming atmospheric corrosion resistant steel is composed of components of following weight percent: C: 0.04-0.09%, Si: 0.10-0.50%, Mn: 1.20-1.70%, P: <=0.020%, S: < =0.010%, Cu: 0.20-0.60%, Cr: 0.40-0.80%, Ni: 0.20-0.50% and Nb: 0.03-0.07%, and also comprises one or a plurality of Mo: <=0.20%, Ti: <=0.03% and Als: <=0.035%, and allowance is Fe and unavoidable impurity. The yield strength of the steel of the invention is more than or equal to 550MPa, the tensile strength is more than or equal to 650MPa, the percentage elongation is more than or equal to 18%, the corrosion resistance is equivalent to SPA-H steel which is used for previous containers, and the steel has excellent welding performance, cold roll forming performance and low temperature impact toughness, which is beneficial for extending and applying.

The invention provides high-corrosion resistance and high-strength weather resistant steel which comprises the following chemical components (in weight percentage): 0.002 percent to 0.005 percent of C, 0.20 percent to 0.40 percent of Si, 0.01 percent to 0.05 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.008 percent of S, 0.01 percent to 0.05 percent of Al, 0.20 percent to 0.40 percent of Cu, 4.50 percent to 5.50 percent of Cr, less than or equal to 0.40 percent of Ni, 0.001 percent to 0.006 percent of Ca, 0.001 percent to 0.006 percent of N, less than or equal to 0.03 percent of Ti, and the rest are Fe and other inevitable impurities. The invention also provides a manufacturing method of the weather resistant steel. The yield strength of the weather resistant steel is more than 700MPa, the extensibility is more than 20 percent and the atmospheric corrosion resistance is higher than that of traditional high-strength weather resistant steel; in addition, the steel can be directly used in atmospheric environment without being coated, and meets the requirements of railway freight car, container and bridge building fields.

The invention discloses a hyperstrength atmospheric corrosion-tolerant steel, which comprises the following parts: 0.01-0.07% C, 0.25-0.50% Si, 1.60-2.00% Mn, not more than 0.018% P, not more than 0.008% S, 0.20-0.50% Cu, 0.40-0.75% Cr, 0.25-0.60% Ni, 0.03-0.08% Nb, 0.10-0.40% Mo, not more than 0.02 Ti, not more than 0.035% Als, not more than 0.003% B and Fe and impurity.

The invention relates to high-strength atmospheric corrosion resistant steel and a production method thereof, and belongs to the field of metallurgy. The technical problem to be solved by the invention is to provide the high-strength atmospheric corrosion resistant steel of which the yield strength is more than or equal to 550 MPa. The high-strength atmospheric corrosion resistant steel comprises the following chemical compositions in percentage by weight: less than or equal to 0.12 percent of carbon, less than or equal to 0.75 percent of silicon, less than or equal to 1.50 percent of manganese, less than or equal to 0.025 percent of phosphorus, less than or equal to 0.008 percent of sulfur, 0.30 to 1.25 percent of chromium, 0.12 to 0.65 percent of nickel, 0.20 to 0.55 percent of copper, 0.006 to 0.02 percent of titanium, more than 0.09 percent and less than or equal to 0.15 percent of vanadium, 0.01 to 0.02 percent of nitrogen, 0.015 to 0.03 percent of niobium, and the balance of iron and inevitable impurities. The high-strength atmospheric corrosion resistant steel has superior comprehensive properties of high strength, high toughness, high plasticity, obvious yield point and the like, and has wide application prospect.

The invention provides ultra-low carbon hot rolling weathering steel whose yield strength is more than 450MPa aiming at the defects of existing weathering steel that the mechanical property and the atmospheric corrosion resistance are bad and the C content is over high, which is composed of components with following weight percent: C 0.01-0.05%, Si 0.10-0.40%, Mn 1.50-1.90%, P<=0.02%, S<=0.010%, Cu 0.15-0.55%, Cr 0.20-0.80%, Ni 0.10-0.50%, Mo 0.05-0.50, Nb 0.01-0.05% and Ca 0.0010-0.0020, and allowance is Fe and unavoidable impurity. The strength grade of the steel of the invention is higher than that of traditional steel and the steel has excellent low temperature impact toughness, welding performance and atmospheric corrosion resistance, and adopts ultra-low carbon design, which is beneficial for extending and applying.

The invention discloses a control method for coast atmospheric corrosion resistant scale on the surface of a boat deck, which belongs to the field of steel for hull structures. According to the invention, the structure and thickness of scale on the surface of a boat deck is controlled by optimizing production processes for boat decks. The method comprises the following key points: controlling parameters of heating temperature, time, residual oxygen and the like for continuous casting billets and reinforcing a de-scaling effect once; controlling the index of chloride ion in water for production, reducing the content of deposited chloride ions in scale and inhibiting corrosive pitting; controlling initial rolling temperature and finishing rolling temperature in the stage of finish rolling, reasonably utilizing a weak water cooling system, increasing the content of Fe3O4 in scale, reducing the content of Fe2O3, retaining a small amount of FeO and enabling the scale to have good plasticity, a bonding force and corrosion resistance. The advantages of the invention are as follows: it does not need to reconstruct existing equipment, and the surface quality and production efficiency of the boat deck can be enhanced through technological optimization; structural composition of the scale is reasonably controlled, which enables the surface of the boat deck to have excellent coast atmospheric corrosion resistance, especially enables corrosive pitting caused by chloride ions to be inhibited, and enables the storage duration of the boat deck in coast environment to be prolonged.

The invention discloses a high-toughness weather-resistant steel plate with the yield strength of 550MPa and a preparation method of the high-toughness weather-resistant steel plate. The high-toughness weather-resistant steel plate is prepared from the following chemical components by weight percent: 0.05 to 0.10 percent of C, 0.10 to 0.40 percent of Si, 1.20 to 1.70 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.008 percent of S, 0.40 to 0.80 percent of Cr, 0.15 to 0.40 percent of Ni, 0.25 to 0.40 percent of Cu, 0.015 to 0.040 percent of Als, 0.030 to 0.070 percent of Nb, and 0.010 to 0.040 percent of Ti, and the balance of Fe and unavoidable impurities, wherein Pcm is equal to C+Si/30+(Mn+Cu+Cr)/20+Mo/15+Ni/60+V/10+5B and less than or equal to 0.20 percent. The microscopic tissue of the weather-resistant steel plate obtained according to the method disclosed in the invention is composite-phase tissue of ferrite, granular bainite and little pearlite,the ReL is 560 to 650MPa, Rm is 680 to 780MPa, A is 22.0 to 26.0 percent, and the longitudinal Charpy V-type impact power KV2 is greater than 70J at the temperature of -40 DEG C, and the high-toughness weather-resistant steel plate has excellent welding performance, cold bending forming performance and atmospheric corrosion resistance.

The invention relates to a test method for lossless monitoring and detection for the material accelerated corrosion under a simulated marine environment, which comprises a corrosion accelerating test under the simulated marine environment and a test for the lossless monitoring and detection for the corrosion potential of material, wherein the corrosion accelerating test under the simulated marine environment is performed on a corrosion accelerating module, which can be used for finishing the tests for the marine or industrial atmospheric corrosion, splashed spoondrift corrosion, tidal range corrosion, full-soaking corrosion and sea mud microbiological corrosion. The test for the lossless monitoring and detection for the corrosion potential of material is finished by using a corrosion potential lossless monitoring and detection module. The method provided by the invention has the advantages that an environment for simulating each corrosion area in the ocean is supplied, the test period is shortened by performing the corrosion accelerating test, and the corrosion degree of the material is monitored and detected in the whole process. The method is used for supplying a technical support for evaluating the corrosion resistance of the material under the marine environment, thereby shortening the period of researching and testing the material.

The invention relates to an accelerated test method for simulating the atmospheric corrosion of metal materials, comprising the following steps: (1) preparing a metal sample; (2) preparing dipping solution from 0.01-1mol/L NaCl, 0.05-0.5mol/L Na2SO4 and 0-0.05mol/L Na2S2O8; (3) dipping the metal sample at 25-50 DEG C, humidifying the metal sample at 25-50 DEG C and drying the metal sample at 40-70 DEG C in a circulating way, and determining the single or total testing time according to the need; and (4) treating the metal sample to analyze the corrosion weight loss, the corrosion products and the morphology. The accelerated test method is used for simulating the behavior and the law on the atmospheric corrosion of the aluminum, the aluminum alloy and other aluminum materials in the humid and hot environment, the marine environment and other different environment and is also used for rapidly evaluating the corrosion resistance of various aluminum materials.

Provided are an atmospheric corrosion test procedure and an apparatus used for the test. The procedure involves a salt spray step for supplying salt content containing chloride ions on the surfaces of test pieces placed in a thermo-humidistat chamber and a subsequent dry-wet cyclic step including a dry sub-step for drying the surface of the test pieces in the thermo-humidistat chamber at a low relative humidity and a subsequent wet sub-step at a higher relative humidity than that in the dry sub-step, which are cycled. The salt content is supplied by spraying the salt water in the salt spray step. An exhaust step for removing the salt mist sprayed inside thermo-humidistat chamber is further inserted between the salt deposition step and the dry sub-step. The quantity of the salt content deposited on the surfaces of the test pieces is controlled by adjusting the quantity of the sprayed salt water.

The present invention relates to a weather-resistant gas shielded welding wire, its chemical components are (by mass percentage):C less than or equal to 0.10, Si less than or equal to 0.6, Mn 1.2-1.6, S less than or equal to 0.030, P less than or equal to 0.030, Cu 0.10-0.60, Gr 0.30-0.90, Ni 0.20-0.60, Ti 0.03-0.12 and the rest is iron powder, in which the optimized range of described Ni is 0.30-0.50. Besides, it contains no elements of B and Re. The deposited metal and welded joint obtained by said invented welding wire have good atmospheric corrosion resistance, at the same time have good comprehensive performance, specially, its low-temp. impact toughness at -40 deg.c is good. The comprehensive performance of deposited metal obtained by said invented welding wire is good, its yield strength is greater than or equal to 450 MPa, tensile strength is greater than or equal to 550 MPa, its extensibility is greater than or equal to 450 MPa, strength is greater than or equal to 550 Mpa, its extensibility is greater than or equal to 220%, and AKv (under the condition of -40 deg.C) is greater than or equal to 100 J.

The invention provides a method for manufacturing SPA-H high-strength atmospheric corrosion resistance steel by using a continuous annealing machine set, belonging to the field of rolling of cold rolled strips. Parameters of a hot rolling process are as follows: the heating temperature is 1180-1260 DEG C, the final rolling temperature is 860+/-20 DEG C, the rolling temperature is 610+/-20 DEG C, and the cold rolling screwdown rate is controlled within a range of 35-60% according to different specifications. The temperature of a continuous annealing heating section is 800+/-20 DEG C, the temperature of a soaking section is 800+/-20 DEG C, the temperature of a slow cooling section outlet is 680+/-20 DEG C, the temperature of a quick cooling section outlet is 430+/-20 DEG C, the temperature of an overageing section is 400+/-20 DEG C, the process speed is 150-200 mpm, the soaking time is 200-250 s, and the leveling elongation is 1.2+/-0.3 %. The method provided by the invention has the following advantages that: the SPA-H high-strength atmospheric corrosion resistance steel generally manufactured on a hot rolling production line in the prior art is successfully manufactured on the continuous annealing machine set by using the cold rolling process while the hot rolling production machine set is affected by factors like limit specifications and mechanical equipment capacities and the like; and the cold rolling process, continuous annealing process and other processes are optimized in such a way that the manufactured high-strength atmospheric corrosion resistance steel has high strength and good elongation.

An industrial atmospheric corrosion resistant rebar and a production method thereof belong to the technical field of steel for corrosion resistant rebars. The rebar comprises the following chemical components, by weight C 0.14-0 .19%, Si 0.4-0 .6%, Mn 0.8-1 .2%, P 0.05-0. 08%, S <0.005%, V 0.03-0 .07%, Cu 0.32-0 .45%, Cr 0.4-0 .6%, and the balance Fe. A process of primary melting in a converter + refining in an LF furnace + continuous casting + high temperature open rolling + medium and low temperature finish rolling + grading cooling is adopted in the production method to obtain high-strength industrial atmospheric corrosion resistant steel. Through a rational component design and establishment of reasonable continuous casting and rolling process parameters to suppress surface enrichment of single-phase Cu, so an economical non-Ni Cu-P series corrosion resistant steel is developed. According to the invention, the advantages are as follows: by employing existing steel production equipment, surface quality problems of ingot blanks and mill bars of non-Ni corrosion resistant steel are solved and ultrafine grain structures are obtained, thus improving corrosion resistance, and meeting performance requirements on industrial atmospheric corrosion resistant rebars at economical costs, having a very broad application space in China.

The invention discloses a steel plate for structure with excellent marine atmospheric corrosion resistance and a production method thereof. The steel plate comprises the chemical ingredients by weight percent: 0.001-0.08% of C, 0.10-0.50% of Si, 0.50-1.60% of Mn, 0.080% or less of P, 0.025% or less of S, 0.01-3.50% of Ni, 0.01-0.50% of Mo, 0.01-1.20% of Cu, 0.001-0.060% of Nb, 0.0005-0.0040% of Ca, 0.010-0.080% of Al, 0.0080% or less of N, the balance of Fe and inevitable impurities. A controlled rolling and cooling process is adopted; the heating temperature of a continuous casting billet before rolling is 1100-1250 DEG C; the roughing end temperature is 990-1080 DEG C; the finishing rolling temperature is 850-970 DEG C; laminar cooling is adopted after rolling; the final rolling temperature is 250-750 DEG C; and the cooling speed is 5-40 DEG C/s. The situation that a steel ball has excellent resistance to the marine-atmosphere environment by low carbon and alloy ingredient is ensured.

The invention relates to an on-line atmospheric corrosion measuring device which mainly solves the problems that in the prior art, the measurement accuracy is low and operation is complex. The on-line atmospheric corrosion measuring device comprises epoxy resin daub, at least one electrode set and lead wires; each electrode set is composed of a work electrode with the lead wire, a counter electrode and a reference electrode, and all the electrode sets are entirely packed in the epoxy resin daub; the section of each counter electrode is in the shape of a circular ring, the work electrodes penetrate through the center of the circular rings and are insulated, and the section of each work electrode is in the shape of a circle, wherein a hole is formed in the center of the circle; the reference electrodes penetrate through the holes and are insulated. According to the technical scheme, the problems are well solved, and the device can be applied in on-line atmospheric corrosion measuring.

The high strength weather resisting submerged arc welding wire consists of: C 0.04-0.15 wt%, Mn 1.2-2.0 wt%, S not more than 0.030 wt%, P not more than 0.030 wt%, Cu 0.10-0.30 wt%, Cr 0.40-1.2 wt%, Ni 0.20-0.80 wt%, and Ti 0.03-0.10 wt%. The welding wire forms fused-on metal and welded joint with excellent atmospheric corrosion resistance and excellent comprehensive performance, including yield strength not lower than 450 MPa, tensile strength not lower than 550 MPa, elongation greater than 22 %, and especially low temperature impact toughness of Akv not lower than 60 J at the temperature of -40 deg c.

The invention relates to a high-strength and high-toughness automatic submerged arc welding wire with weathering resistance and mainly aims at overcoming disadvantages of poor atmospheric corrosion resistance, high production cost and the like of the existing submerged arc welding materials. In term of technical measures, the welding wire is made from the following chemical components by weight percent: C: 0.05-0.12, Si: 0.01-0.10, Mn: 1.50-2.1. S: not more than 0.015, P: not more than 0.020, Ni: 0.20-0.60, Cr: 0.20-0.50, Cu: 0.25-0.50, Ti: 0.05-0.16, B: 0.002-0.010, Als: 0.001-0.015, Fe and other unavoidable impurities. The welding wire is matched with a basic sintered flux for welding, a weld joint has excellent atmospheric corrosion resistance and comprehensive mechanical properties, and a deposited metal at a weld seam has tensile strength up to 560MPa and ballistic work up to 107J at -40 DEG C and up to 87J at -50 DEG C.

The present invention relates to steel with high intensity and weatherability used for low alloy power rods and the preparation method thereof. The weathering steel has the chemical composition and the weight percentage content that C is 0.06-0.12 percent, Si is 0.15-0.35 percent, Mn is 1.0-1.40 percent, S is less than or equal to 0.030 percent, P is less than or equal to 0.030 percent, Cu is 0.15-0.30 percent, Al is less than 0.04 percent, Nb is 0.01-0.03 percent, and the residual is Fe and microimpurity. The present invention performs combined blown converter smelting, LF ladle refining, soft argon blowing, and sheet billet continuous casting by using the prior equipment and the conventional process production, and performs microalloying treatment through adjusting the content of partial elements. By accurately controlling the processing condition, the economic weathering steel with good atmospheric corrosion resistant performance and comprehensive mechanical performance can be produced.

The invention provides industrial atmospheric corrosion resistant and high strength bolt steel for a non-spraying bridge structure and a manufacturing method of the industrial atmospheric corrosion resistant and high strength bolt steel, and belongs to the technical field of high strength bolt steel for the bridge structure. The industrial atmospheric corrosion resistant and high strength bolt steel for the non-spraying bridge structure comprises, by weight, 0.16-0.45% of C, 0.01-2.2% of Si, 0.3-2.2% of Mn, 0.001-0.024% of P, 0.002-0.025% of S, 0.0005-0.0100% of B, 0.04-0.50% of Ti, 0.01-0.20% of V, 0.001-0.10% of Al, 0.001-0.34% of Cr, 0.2-0.5% of Cu, 0.2-1.5% of Ni and the balance Fe and trace of impurities. According to the high strength and weather resistant bolt steel, the corrosion resistance index I worked out according to the chemical composition prediction formula is larger than or equal to 6.3, the bolt steel is suitable for producing bolts with the specification range M of 16-30 mm, after the bolt steel is made into bolts in a bolt machining plant, the quenching-and-tempering heat treatment process system is combination of oil quenching of 840-920 DEG C and tempering of 380-625 DEG C, and the optimal strength and toughness match is obtained. The industrial atmospheric corrosion resistant and high strength bolt steel for the non-spraying bridge structure and the manufacturing method of the industrial atmospheric corrosion resistant and high strength bolt steel have the advantages that the bolt steel is applicable to matched connection of plates and profiles of the non-spraying bridge structure and has excellent industrial atmospheric corrosion resistance and low temperature resistance.

The invention discloses atmospheric corrosion resistant steel for a high-strength container and a manufacturing method for the atmospheric corrosion resistant steel. The atmospheric corrosion resistant steel consists of the following components in percentage by weight: 0.03-0.10% of C, 0.30-0.60% of Si, 0.40-0.80% of Mn, less than or equal to 0.015% of P, less than or equal to 0.006% of S, less than or equal to 0.05% of Al, 0.20-0.4% of Cu, 0.40-0.90% of Cr, 0.06-0.12% of Ti, 0.001-0.006% of Ca, less than or equal to 0.006% of N, and the balance Fe and inevitable impurity elements. Based on relatively low C-Mn steel component content, weather-resistant elements Cu and Cr and micro alloy strengthening element Ti are added and compounded, and controlled rolling and cooling processes are adopted for producing, so that a steel plate has fine ferrite and a little bainite structure, and has yield strength index of 450-550MPa or higher.