CN102851582A - Corrosion-resistant steel for acidic crude oil storage and transportation tank and manufacturing method thereof - Google Patents
Corrosion-resistant steel for acidic crude oil storage and transportation tank and manufacturing method thereof Download PDFInfo
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- CN102851582A CN102851582A CN201110179915XA CN201110179915A CN102851582A CN 102851582 A CN102851582 A CN 102851582A CN 201110179915X A CN201110179915X A CN 201110179915XA CN 201110179915 A CN201110179915 A CN 201110179915A CN 102851582 A CN102851582 A CN 102851582A
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Abstract
The invention provides a corrosion-resistant steel for an acid crude oil storage and transportation tank and a manufacturing method thereof, wherein the corrosion-resistant steel comprises the following chemical components: 0.02% -0.17%, Si: 0.05-0.50%, Mn: 0.20% -1.80%, P: 0.001% -0.03%, S: 0.015% or less, Al: 0.01% -0.08%, Sn: 0.01% -0.20%, Nb: 0.005-0.05%, Ti: 0.005 to 0.05%, the balance being Fe and unavoidable impurities, and further comprising Sb: 0.01% -0.2%, W: 0.005-0.20%, Cr: 0.005-0.15%, Mo: 0.01-0.15% of one or more than two. Heating the steel slab to a temperature not lower than 1100 ℃ but not higher than 1250 ℃; controlling rolling in two stages of 1100-950 ℃ austenite recrystallization zone and 920-800 ℃ non-recrystallization zone, and ensuring that the accumulated reduction of the two-stage rolling is not lower than 66% and the final rolling temperature is 820-860 ℃; the cooling rate is 3-15 ℃/s.
Description
Technical field
The invention belongs to low alloy steel and make the field, relate to a kind of suitable sour crude oil accumulating tank corrosion-resistant steel and manufacture method thereof.
Background technology
Crude oil especially sulphur content is higher than 0.5% sour crude oil accumulating tank such as oil carrier oil cargo tank and is in the harsh corrosive environment always, and along with the increase of sour crude oil output, the transportation safety problem that corrosion causes is more outstanding, and the crude oil leakage that causes because of corrosion can bring about great losses to economy and ecotope.Existing crude oil accumulating tank all must adopt the method for coating antiseptic, using conventional AH/DH32, AH/DH36 grade high-strength to make ship steel such as the oil carrier oil cargo tank builds, the steel plate shot-peening is coated with priming, painting anticorrosion coats with lacquer again, but easy aging the peeling off of coating accelerated the corrosion of steel plate, therefore will be to oil cargo tank steel plate again application or repair welding every 10 years, even the replacing steel plate, and the workload that checks and repair is large, the cycle is long, causes huge cost burden to the shipowner.The existing crude oil accumulating tank position that studies show that is different, and its mechanism of corrosion is also different, such as the oil cargo tank top owing to be filled with O in the cabin
2, CO
2, SO
2Deng rare gas element and the H that evaporates from crude oil
2The S gas reaction causes general corrosion.And H
2S is oxidized to stratiform simple substance S under corrosion iron rust katalysis, very easily peel off to fall into the cargo tank base plate and deposit, and the high concentration chloride acting in conjunction from crude oil with the pot bottom accumulation forms serious local point-like corrosion pit in the plate coating exfoliation.The dock inspection has found that oil carrier oil cargo tank base plate tubercular corrosion position quantity can reach several thousand, and the darkest 10mm that reaches of corrosion pit becomes the huge potential safety hazard of Oil Carrier Transportation.
For the etching problem of existing oil cargo tank, oil carrier corrosion resistant steel for cargo oil tanks standard specifications has been passed through in the DE53 of International Maritime Organizaton (IMO) meeting, allows the oil carrier oil cargo tank to use the Project for Corrosion Protection that corrosion-resistant steel replaces coating.As oil carrier oil cargo tank steel, the patent 1 of publication number CN 1946864A discloses and has comprised Ni, Cu, W, Cr, Zr, Mo, Sb, the corrosion-resistant steel composition of Sn, the patent 2 of Granted publication CN 100562600C discloses and has contained Ni, Cu, Cr, Sr, Ba, La, the crude oil corrosion-resistant steel of the compositions such as Ce, the patent 3 of publication number CN 101415852A discloses has C, Si, Mn, P, S, Al, N, W, Cr, the petroleum tank of Mo adds Sn with selectivity in the steel, Sb, Ca, the REM element, 4 of the patents of publication number CN 101525729A disclose has C, Si, Mn, P, S, Al, Ni, Cr, Ti, Ca, selectivity is added Cu in the steel of N, the B composition.When yet the corrosion-resistant steel of above-mentioned patent uses as the steel under the former oil environment, although can improve the corrosion resistance of the petroleum tanks such as oil cargo tank, but these technology are not carried out corrosion evaluation in strict accordance with the standard of IMO, can meet the demands and still can not get checking, can particularly satisfy the checking that the corrosion resistance nature of the sour crude oil accumulating tank of more abominable corrosive environment requires more insufficient, and Ni has all been added in these inventions, the expensive alloying constituent such as REM, manufacture difficulty and cost have been increased, reduced helping the user to reduce the meaning that causes financial loss because of corrosion, this just requires to adapt to the sour crude oil environment and satisfies the novel corrosion resistant steel that the IMO tentative specification requires.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, technical problem to be solved by this invention is to provide a kind of surface of steel plate to need not the painting anticorrosion layer, has novel corrosion resistant steel and the manufacture method thereof of anti-comprehensive and local corrosive nature under the excellent sour crude oil environment, is particularly suitable as simultaneously oil carrier oil cargo tank and land storage tank top board and base plate and uses.
The present invention is achieved through the following technical solutions:
For achieving the above object, the sour crude oil accumulating tank corrosion-resistant steel that the present invention is designed, its chemical ingredients contains by weight percentage that C:0.02%～0.17%, Si:0.05%～0.50%, Mn:0.20%～1.80%, P:0.001%～0.03%, S:0.015% are following, Al:0.01%～0.08%, Sn:0.01%～0.20%, Nb:0.005%～0.05%, Ti:0.005%～0.05%, and surplus is made of Fe and inevitable impurity.
Further also contain in Sb:0.01%～0.2%, W:0.005%～0.20%, Cr:0.005%～0.15%, Mo:0.01%～0.15% one or more.
Below elaborate sour crude oil accumulating tank of the present invention each alloying constituent mechanism of action in the corrosion-resistant steel, wherein percentage symbol % represents weight percent:
C：0.02％～0.17％
C is the bioelement that guarantees hardness of steel, and content is more than 0.02%, but surpasses welding property deterioration when a certain amount of when content.Therefore the increase of C content also can increase the perlite phase content that contains the lamella cementite in the steel in addition, and perlite becomes negative electrode under sour environment, can promote corrosion, is limited to 0.17% on.Consider that from economy and product performance angle preferred C content is controlled at 0.06%～0.15%.
Si：0.05％～0.50％
Si is deoxidation composition main in the steelmaking process, must contain more than 0.05% in order to obtain sufficient deoxidation effect.If but surpass the toughness that the upper limit then can reduce mother metal and weld, and the Si that exists with the solid solution form carries the high-intensity while and also can improve ductile-brittle transition temperature, so Si content is 0.05%～0.50%, and preferred content is 0.10%～0.35%.
Mn：0.20％～1.80％
Mn guarantees the intensity of steel and the bioelement of toughness, and Mn is combined with S and is formed MnS, avoids grain boundaries to form FeS and the thermal crack that causes, and the while, Mn also was good reductor.But be lower than 0.20% when Mn content, then be difficult to guarantee above-mentioned effect, if the Mn element too Gao Zehui increase the weight of the strand segregation and worsen welding property, so Mn content should be controlled at 0.20%～1.80%, preferred content is 0.80%～1.50%.
P：0.001％～0.03％
P is inevitable impurity element in the steel, can worsen toughness and the welding property of steel.If especially P content surpass 0.03% the welding property of steel significantly descend, be limited to 0.03% on therefore, preferred upper limit is below 0.018%.P can form the phosphoric acid salt as corrosion inhibitor but then, is conducive to improve the corrosion resistance nature of steel under sour environment, therefore in order to improve erosion resistance, need contain P in the steel more than 0.001%, so P content is 0.001%～0.03%.
Below the S:0.015%
If S content surpasses 0.015%, can in steel, form a large amount of MnS and be mingled with, and MnS is mingled with the origin that the position is tubercular corrosion, thereby reduce the erosion resistance of steel, to take measures to make therefore that S content reduces as far as possible in the steel.According to the present invention, the S upper content limit is 0.015%, and preferred upper limit is 0.005%.
Al：0.01％～0.08％
Deoxidation and crystal grain thinning element that Al must add as the present invention add content more than 0.01%, but produce easily the strand thermal crack when surpassing 0.08%, form and be mingled with in a large number, the simultaneously toughness drop of steel, so Al upper content limit is 0.08%, and the preferred content scope is 0.015%～0.05%.
Sn：0.01％～0.20％
Sn is the raising erosion resistance composition that the present invention must add, and is present in the steel with the solid solution form, can significantly improve the galvanic corrosion self-potential of steel, thereby suppresses the corrosion of steel under the acid attack environment.But do not reach Effective Raise erosion resistance purpose when content is lower than 0.01%, and when surpassing 0.20%, can be enriched in austenite grain boundary and high-temp plastic is reduced at continuous casting and the hot procedure such as rolling, so Sn content preferable range is 0.01%～0.20%.
Sb：0.01％～0.2％
Sb is similar to Sn to the corrosion resistance nature effect that improves steel, is proved to be the corrosion resistance nature under the energy Effective Raise acid attack environment, if add the corrosion resistance nature that can further improve steel with Sn, is the optional interpolation element of the present invention.Sb content surpasses 0.2% anticorrosion effect thermoplasticity saturated and steel to be reduced.Sb content preferable range is 0.01～0.2% when therefore adding.
W：0.005％～0.20％
W is the interpolation element that optionally improves erosion resistance in the present invention.W can form WO in the acid attack environment
4 2-Ion and suppress the erosion of the negatively charged ion such as Cl-ion also can form FeWO
4Tight zone and suppress the corrosion.W content surpasses 0.20% rear inhibition corrosive effect and reaches capacity, and is unfavorable for welding property, is limited to 0.20% on therefore.Preferred W content range when therefore the present invention adds is 0.005%～0.20%.
Cr：0.005％～0.15％
Cr is along with oxidation is carried out forming fine and close Cr on the steel surface
2O
3Layer, the negatively charged ion that can suppress under the acid attack environment is invaded, thereby reduces Cl
-Deng the enrichment of negatively charged ion on the steel surface.Consider that from cost and anticorrosion effect aspect the preferred content scope of adding Cr is 0.005%～0.15%.
Mo：0.01％～0.15％
Mo is similar to W, Cr to the erosion resistance effect that improves steel, can promote the surface compact rusty scale to form, and stops further developing of corrosion, considers that from cost and performance anticorrosion effect aspect the preferred content scope of interpolation is 0.01%～0.15%.
Nb：0.005％～0.05％
Nb is the grain-size of refinement steel effectively, is the element that adds as the intensity that improves steel and toughness.When Nb content is little to the performance effect of steel less than 0.005% the time, and when surpassing 0.05%, the welding property of steel and toughness all reduce, so the Nb content range is 0.005%～0.05%.
Ti：0.005％～0.05％、
Ti is the composition that adds as improving steel and weld toughness, exist and play a role with the TiN form, effect is little less than 0.005% the time, easily forms macrobead TiN when surpassing 0.05% and loses effect, and therefore adding the Ti content range is 0.005%～0.05%.
Steel of the present invention is except mentioned component, surplus is made of Fe and inevitable impurity, as long as guarantee foreign matter content within the specific limits, then allow to exist and can not damage anticorrosion effect and the performance of steel of the present invention, such as often adding scrap smelting for reducing cost, unavoidably bring the impurity components such as Cu into, the gases such as O, N also are difficult to remove fully, therefore can allow Cu content below 0.1%, O content below 0.005%, N content is below 0.008%.
Above-mentioned sour crude oil accumulating tank is described as follows with the manufacture method technical scheme of corrosion-resistant steel:
Steel billet or steel ingot that the present invention will meet above-mentioned chemical ingredients obtain by the rolling steel plate that is processed into, and preferred following methods is made steel plate:
(1) 5 principal element C, Si, Mn, the P, the S that adjust steel by converter and add as requested other alloying constituent and carry out melting to the scope of the invention.
(2) will carry out secondary refining by ladle furnace from the molten steel that converter is taken out of, further reduce the detrimental impurity content such as O, S, nonmetal inclusion.
(3) above-mentioned steel is made slab by continuous casting process, can immediately or reheat slab behind the Slow cooling according to the factory flow layout afterwards.
(4) above-mentioned plate slab is heated to the temperature that is not less than 1100 ℃ but is not higher than 1250 ℃.Be not enough to allow alloying element be dissolved into fully in the austenite in the temperature that is lower than 1100 ℃, can not guarantee the finishing temperature that hot rolling is required.On the other hand, can be AUSTENITE GRAIN COARSENING in the temperature that is higher than 1250 ℃, will reduce the toughness of steel plate.
(5) consider with the mechanical property requirements of corrosion-resistant steel from satisfying the sour crude oil accumulating tank, select suitable technique hot rolling, preferred 1100～950 ℃ of austenite recrystallization districts and 920～800 ℃ of non-recrystallization district temperature two-stage controls are rolling, and guaranteeing that rolling accumulation draught of two-stage is not less than 66%, finishing temperature is preferably 820～860 ℃.
(6) can select the rate of cooling of 3～15 ℃/s scope after the hot rolling to the mechanical property demand of steel plate according to the user.For example yield strength requires to be 315N/mm
2Other high-strength steel of higher level, and impelling strength (temperature requirement is more than 0 ℃ the time, and preferred hot rolling subordinate phase temperature is below 950 ℃, and finishing temperature is that the type of cooling is for to cool off in air below 850 ℃.If yield strength requires to be 390N/mm
2More than or the impelling strength temperature requirement below-20 ℃ the time, then preferred hot rolling subordinate phase temperature is below 920 ℃, finishing temperature is controlled at below 830 ℃, with the above rate of cooling of 5 ℃/s steel plate is cooled to below 650 ℃ thereafter.
The sour crude oil accumulating tank that aforesaid method is made is 8～50mm with the corrosion-resistant steel plate thickness, and use also can demonstrate excellent corrosion resistance nature not having in the painting anticorrosion layer situation directly.
Adopt sour crude oil accumulating tank corrosion-resistant steel of the present invention, have following effect:
(1) adopts the corrosion-resistant elemental composition design of adding micro-Sn, can select to add the one kind or two or more combination among Sb, W, Cr, the Mo, can further obviously improve the galvanic corrosion self-potential of steel in high-concentration acidic wastewater solution, the top steel of establishment sour crude oil corrosive environment such as oil carrier oil cargo tank and general corrosion and the local corrosion of bottom steel, the painting anticorrosion layer be can need not and directly use, a large amount of coating materials and manual maintenance cost saved.
(2) because steel of the present invention has the corrosion resistance nature under the excellent sour crude oil environment, can reduce the corrosion allowance design, reduce the crude oil storage and transport process because corrosion causes economy and the Ecological Loss probability of leakage, improve security.
(3) steel of the present invention has no special requirements to manufacturing process, adopts the manufacturing process of conventional steel to get final product, and can adopt flexibly rolling and process for cooling in conjunction with mechanical property requirements, has reduced manufacture difficulty and cost.
In sum, adopt sour crude oil accumulating tank corrosion-resistant steel of the present invention, provide the low-cost steel that have excellent anticorrosive performance under a kind of sour crude oil corrosive environment for building oil carrier oil cargo tank, crude oil storage tank etc.
Description of drawings
Fig. 1 is steel plate corrosion potential figure of the present invention.
Embodiment
The present invention is further described below in conjunction with embodiment:
Smelt pushing up the compound oxygen blast in the end in converter after the hot metal pretreatment, add the alloy material adjusting component after the decarburization, then molten steel send ladle furnace refining and adjusts chemical ingredients each composition of steel shown in table 1 embodiment 1～19, molten steel waters through Continuous casting process and casts out 230mm * 1650mm section slab, with behind these heating steel billets to 1200 ℃, carry out roughing and take 900 ℃ of two-stage finish rolling as beginning, rolling final temperature is 820 ℃, rolling afterwards naturally cooling in air is made the steel plate that thickness is 20mm.
Table 1 invention steel and compared steel chemical ingredients (wt%)
The performance test of anti-the general corrosion:
From embodiment 1～19 steel plate that obtains through aforesaid method; cut the rectangle sample of wide 25mm * long 60mm * thick 5mm; testing surface grinds with 600# diamond sand paper; after washing and acetone cleaning, simulate the general corrosion test at oil cargo tank top, test face is protected with silicone sealant with outside surface.Above-mentioned ready sample is installed in the general corrosion testing apparatus inner room container top of simulating cargo tank gaseous corrosion environment, and namely vinylformic acid covers lower surface, and temperature is controlled by outer chamber heater.The distilled water temperature of test inner room container remains on 36 ℃, and specimen temperature is 50 ℃, and simulation oil cargo tank top hybrid corrosion gas by volume per-cent consists of: 4%O
2, 13%CO
2, 0.01%SO
2, 0.1%H
2S, surplus N
2The process of the test cycle is as follows: the mixed gas temperature is heated to 50 ℃ of maintenances naturally cools to 25 ℃ of maintenances 3 hours after 20 hours, a loop cycle like this is 24 hours, and initial 24 hours gas flow is 120cc/min, remains on afterwards 30cc/min.
Need measure surface-area (S) and the weight of every sample before the corrosion test, 5 sample weighs of every number steel taking-up after 21 days, 49 days, 77 days, 98 days are carried out in test, deduct the rear weight of corrosion with original weight, and calculate average weightless W
21, W
49, W
77And W
98, reduce thickness C L by following formula Calculation of corrosion
21, CL
49, CL
77And CL
98:
S is sample original table area (cm in the formula
2), D is density (g/cm
3), W
21, W
49, W
77And W
98Be respectively the 5 slice sample mean weightlessness (g) of corrosion test after 21 days, 49 days, 77 days and 98 days.Obtain coefficient A and B by the corrosion thickness loss of corrosion test after 21 days, 49 days, 77 days and 98 days with the method for least squares meter, then corrosion reduces the available following formula description of relation of thickness C L and A, B:
CL＝A×t
B
A in the formula (mm) and B are coefficients, t be etching time (my god)
For example the life-span of oil carrier is 25 years, and the corrosion that available following formula was obtained after 25 years reduces thickness (ECL):
ECL(mm)＝A×(25×365)
B
The corrosion in 25 years of obtaining according to test-results reduce thickness E CL according to following grade evaluation:
A：ECL(mm)≤1.00
B：1.00＜ECL(mm)≤1.50
C：1.50＜ECL(mm)≤2.00
D：ECL(mm)＞2.00
The A level excellent performance of anti-the general corrosion, the anti-general corrosion of B level is functional, and the C level is that anti-general corrosion performance is qualified, and the D level performance inconsistency of anti-general corrosion lattice, 2mm are the code requirement upper limits of the IMO of International Maritime Organizaton.Even A～C level show steel plate can be in 25 years life times not the painting anticorrosion layer also can use safely.
The table 2 that the results are shown in the test of above-mentioned simulation oil cargo tank top general corrosion, as can be known from the results, the steel plate of embodiment 1～13 according to the invention, anti-general corrosion performance is all good, be A～C level, no matter whether the steel at the comparative steel embodiment 14～19 that does not contain Sn add Sb on the other hand, W, Cr, Mo apolegamy element appraise is the D level, for defective, illustrate that selecting to add element adds further raising corrosion resistance nature with Sn, the anti-general corrosion of hence one can see that steel of the present invention is good, life span in also can demonstrate good corrosion resistance nature in 25 years even use in the situation of painting anticorrosion layer not at oil carrier.
The performance test of anti-the local corrosion:
Cut the rectangle sample of wide 25mm * long 60mm * thick 5mm from the steel plate of embodiment 1～19, sample bores the hole of a diameter 2mm, after specimen surface is ground with the 600# emery paper, makes local corrosion test's sample after washing and acetone cleaning.Utilize corrosion testing apparatus to carry out the local corrosion test of Simulation of Crude Oil bilge section environment, sample hangs on 0.3mm diameter nylon fishing line processed and carries out the solution soaking corrosion test in the corrosion test solution.Simulated oil bilge section acid attack solution is 10wt%NaCl, adjust pH value to 0.85 with HCl, this pH value is the Schwellenwert of surveying in actual crude oil storage tank local corrosion hole, changes new soln after 24 hours, and liquor capacity must be greater than 20cc/cm with the ratio of sample corroded area
2, solution temperature remains on 30 ℃, and the solution soaking test period is continuous 72 hours.Every number the steel sample quantities is 5, measures weight and surface-area before the test, tests after 72 hours and calculates a year erosion rate according to following formula:
C.R. is a year erosion rate (mm/) in the formula, and wherein W is corrosion weight loss (g), and S is the long-pending (cm of specimen surface
2), D is the density (g/cm of steel
3).Estimate according to following grade after calculating the C.R. of each steel:
A: erosion rate is less than or equal to 0.25mm/
More than B: the erosion rate 0.25mm/ and less than or equal to 0.50mm/
More than C: the erosion rate 0.50mm/ and less than or equal to 1.00mm/
D: more than the erosion rate 1.00mm/
The A level is the excellent performance of anti-the local corrosion, the B level is that anti-local corrosion is functional, the C level is that anti-local corrosion performance is qualified, and the D level is the performance inconsistency of anti-local corrosion lattice, and 1.00mm/ is that the IMO of International Maritime Organizaton standard is to the upper limit of the corrosion-resistant rate requirement of corrosion-resistant steel.A～C level shows that steel plate can use without the painting anticorrosion layer, and the D level needs to carry out application by coating specification.
The corrosion test of above-mentioned simulation oil cargo tank bottom local corrosion environment be the results are shown in table 2, as seen the steel plate that meets the embodiment 1～13 of the scope of the invention all meets A～C level grade, show that steel of the present invention has a good anti-local corrosion performance under the sour crude oil environment, also can make the anti-local corrosion performance of steel reach qualified grade even only add 1～No. 5 steel of Sn element, if select simultaneously interpolation Sb, W, the one kind or two or more of Cr, Mo then can further reduce erosion rate, reach B level even A level.Hence one can see that, and steel of the present invention not only has good anti-general corrosion performance, also has the anti-local corrosion performance under the peracidity condition, can be used for sour crude oil accumulating tank top board and base plate.
3,7,10 and 19 steel carries out the test of electrochemistry corrosion potential among the selection embodiment in the electrolytic solution of pH=0.85, Fig. 1 has shown the time dependent result of corrosion potential, show that 3,7, No. 10 steel corrosion potentials according to the invention are apparently higher than No. 19 steel of comparative example, explanation steel of the present invention under the peracidity condition has lower corrosion tendency, and compared steel is easy corrosion then.No. 3 steel corrosion potentials than independent interpolation Sn are high again to add simultaneously 7, No. 10 steel of Sn and other non-corrosive metal component, proof selects to add Sb, W, Cr, Mo can further reduce the tendency that corrosion reacts, and has verified general corrosion and the result of local corrosion test among the embodiment.
The result of table 2 corrosion test
Claims (4)
1. sour crude oil accumulating tank corrosion-resistant steel, it is characterized in that its chemical ingredients contains by weight percentage that C:0.02%～0.17%, Si:0.05%～0.50%, Mn:0.20%～1.80%, P:0.001%～0.03%, S:0.015% are following, Al:0.01%～0.08%, Sn:0.01%～0.20%, Nb:0.005%～0.05%, Ti:0.005%～0.05%, surplus is made of Fe and inevitable impurity.
2. sour crude oil accumulating tank corrosion-resistant steel according to claim 1 is characterized in that: further also contain in Sb:0.01%～0.2%, W:0.005%～0.20%, Cr:0.005%～0.15%, Mo:0.01%～0.15% one or more.
3. sour crude oil accumulating tank corrosion-resistant steel according to claim 1 and 2, it is characterized in that: further its chemical ingredients contains C:0.06%～0.15% by weight percentage, Si:0.10%～0.35%, Mn; Below 0.80%～1.50%, the S:0.005%, Al:0.015%～0.05%.
4. sour crude oil accumulating tank corrosion-resistant steel manufacture method according to claim 1 and 2, comprise converter smelting, secondary refining, continuous casting, rolling and cooling, it is characterized in that: above-mentioned plate slab is heated to the temperature that is not less than 1100 ℃ but is not higher than 1250 ℃; Adopt 1100～950 ℃ of austenite recrystallization districts and 920～800 ℃ of non-recrystallization district temperature two-stage controls rolling, and guarantee that rolling accumulation draught of two-stage is not less than 66%, finishing temperature is 820～860 ℃; 3～15 ℃/s of rate of cooling.
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| CN103290186A (en) * | 2013-06-14 | 2013-09-11 | 首钢总公司 | Manufacturing method of corrosion-proof steel plate used for crude oil tanker cargo oil hold inner bottom plate and steel plate |
| CN103305761A (en) * | 2013-06-14 | 2013-09-18 | 首钢总公司 | Corrosion-resistant steel for bottom board in cargo oil compartment of crude oil tanker |
| JP2016166388A (en) * | 2015-03-09 | 2016-09-15 | 新日鐵住金株式会社 | Steel material, steel structure for burying underground and manufacturing method of steel material |
| CN110455881A (en) * | 2019-07-25 | 2019-11-15 | 东莞东阳光科研发有限公司 | A kind of test method of aluminium alloy open circuit potential |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103290186A (en) * | 2013-06-14 | 2013-09-11 | 首钢总公司 | Manufacturing method of corrosion-proof steel plate used for crude oil tanker cargo oil hold inner bottom plate and steel plate |
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| CN111088463B (en) * | 2020-01-21 | 2021-04-27 | 鞍钢股份有限公司 | Steel bar resistant to corrosion in low-temperature atmospheric environment and production method thereof |
| CN112226688A (en) * | 2020-09-30 | 2021-01-15 | 鞍钢股份有限公司 | Corrosion-resistant and biological-adhesion-resistant EH690 steel plate and manufacturing method thereof |
| CN112226688B (en) * | 2020-09-30 | 2021-12-24 | 鞍钢股份有限公司 | Corrosion-resistant and biological-adhesion-resistant EH690 steel plate and manufacturing method thereof |
| CN114086066A (en) * | 2021-11-12 | 2022-02-25 | 江苏科技大学 | Hydrogen sulfide corrosion resistant low alloy material and preparation method and application thereof |
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