CN102851582B - A kind of sour crude oil accumulating tank corrosion-resistant steel and manufacture method thereof - Google Patents
A kind of sour crude oil accumulating tank corrosion-resistant steel and manufacture method thereof Download PDFInfo
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Abstract
The invention provides a kind of sour crude oil accumulating tank corrosion-resistant steel and manufacture method thereof, its chemical composition contains C:0.02% ~ 0.17%, Si:0.05% ~ 0.50%, Mn:0.20% ~ 1.80%, P:0.001% ~ 0.03%, below S:0.015%, Al:0.01% ~ 0.08%, Sn:0.01% ~ 0.20%, Nb:0.005% ~ 0.05%, Ti:0.005 ~ 0.05%, surplus is made up of Fe and inevitable impurity, further also containing Sb:0.01% ~ 0.2%, W:0.005% ~ 0.20%, Cr:0.005 ~ 0.15%, one or more in Mo:0.01 ~ 0.15%.Above-mentioned plate slab is heated to and is not less than 1100 DEG C but not higher than the temperature of 1250 DEG C; Adopt 1100 ~ 950 DEG C of austenite recrystallization districts and the rolling of 920 ~ 800 DEG C of Unhydrated cement temperature two-stage controls, and ensure that two-stage rolling accumulation draught is not less than 66%, finishing temperature is 820 ~ 860 DEG C; Rate of cooling 3 ~ 15 DEG C/s.
Description
Technical field
The invention belongs to manufacture field of low alloy steel, relate to a kind of applicable sour crude oil accumulating tank corrosion-resistant steel and manufacture method thereof.
Background technology
Crude oil especially sulphur content higher than 0.5% sour crude oil accumulating tank such as oil carrier oil cargo tank be in harsh corrosive environment always, and along with the increase of sour crude oil output, corroding the transportation safety problem caused more outstanding, can bring about great losses to economy and ecotope because corroding the crude oil leakage caused.Existing crude oil accumulating tank all must adopt the method for coating antiseptic, such as oil carrier oil cargo tank uses conventional AH/DH32, AH/DH36 grade high-strength to make ship steel and builds, steel plate shot-peening is coated with priming, painting anticorrosion paint again, but coating is easily aging peels off, and accelerates the corrosion of steel plate, therefore will to oil cargo tank steel plate again application or repair welding every 10 years, even change steel plate, and the workload checking and repair is large, the cycle is long, causes huge cost burden to shipowner.There are some researches show that crude oil accumulating tank position is different, its mechanism of corrosion is also different, and such as oil cargo tank top is owing to being filled with the O in cabin
2, CO
2, SO
2deng rare gas element and the H evaporated from crude oil
2s gas reaction causes general corrosion.And H
2s is oxidized to stratiform simple substance S under the katalysis of corrosion iron rust, very easily peels off and falls into cargo tank base plate and deposit, the high concentration chloride acting in conjunction from crude oil accumulated with pot bottom, form serious local point-like corrosion pit in plate coating exfoliation.Dock inspection has found that oil carrier oil cargo tank base plate tubercular corrosion position quantity can reach several thousand, and corrosion pit reaches 10mm the most deeply, becomes the huge potential safety hazard of Oil Carrier Transportation.
For the etching problem of existing oil cargo tank, International Maritime Organizaton (IMO) DE53 meeting have passed oil carrier corrosion resistant steel for cargo oil tanks standard specifications, allows oil carrier oil cargo tank application corrosion-resistant steel to replace the Project for Corrosion Protection of coating.As oil carrier oil cargo tank steel, the patent 1 of publication number CN1946864A discloses and comprises Ni, Cu, W, Cr, Zr, Mo, Sb, the corrosion-resistant steel composition of Sn, the patent 2 of Authorization Notice No. CN100562600C discloses containing Ni, Cu, Cr, Sr, Ba, La, the crude oil corrosion-resistant steel of the compositions such as Ce, the patent 3 of publication number CN101415852A discloses has C, Si, Mn, P, S, Al, N, W, Cr, in the petroleum tank steel of Mo, selectivity adds Sn, Sb, Ca, REM element, the patent 4 of publication number CN101525729A discloses has C, Si, Mn, P, S, Al, Ni, Cr, Ti, Ca, in the steel of N, selectivity adds Cu, B component.But the corrosion-resistant steel of above-mentioned patent as under crude oil environment steel use time, although the corrosion resistance of the petroleum tanks such as oil cargo tank can be improved, but these technology do not carry out corrosion evaluation in strict accordance with the specification of IMO, can meet the demands and still can not get checking, the checking that can the corrosion resistance nature that particularly meet the sour crude oil accumulating tank of more severe corrosive environment require is more insufficient, and these inventions all with the addition of Ni, the contour cost alloy composition of REM, add manufacture difficulty and cost, reduce and help user to reduce because corroding the meaning causing financial loss, this just requires and can adapt to sour crude oil environment and the novel corrosion resistant steel meeting the requirement of IMO tentative specification.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, technical problem to be solved by this invention be to provide a kind of surface of steel plate without the need to painting anticorrosion layer, there is excellent sour crude oil environment under resistance to comprehensively and the novel corrosion resistant steel of local corrosive nature and manufacture method thereof, be particularly suitable as oil carrier oil cargo tank and land storage tank top board and base plate simultaneously and use.
The present invention is achieved through the following technical solutions:
For achieving the above object, sour crude oil accumulating tank corrosion-resistant steel designed by the present invention, its chemical composition is by weight percentage containing C:0.02% ~ 0.17%, Si:0.05% ~ 0.50%, Mn:0.20% ~ 1.80%, P:0.001% ~ 0.03%, below S:0.015%, Al:0.01% ~ 0.08%, Sn:0.01% ~ 0.20%, Nb:0.005% ~ 0.05%, Ti:0.005% ~ 0.05%, and surplus is made up of Fe and inevitable impurity.
Further also containing one or more in Sb:0.01% ~ 0.2%, W:0.005% ~ 0.20%, Cr:0.005% ~ 0.15%, Mo:0.01% ~ 0.15%.
Below elaborate each alloying constituent mechanism of action in sour crude oil accumulating tank corrosion-resistant steel of the present invention, wherein percentage symbol % represents weight percent:
C：0.02％～0.17％
C is the bioelement ensureing hardness of steel, and content is more than 0.02%, but welding property worsens when content exceedes a certain amount of.In addition the increase of C content also can increase the perlite phase content containing lamella cementite in steel, and under sour environment, perlite becomes negative electrode, and can promote corrosion, therefore the upper limit is 0.17%.Consider from economy and product performance angle, preferred C content controls 0.06% ~ 0.15%.
Si：0.05％～0.50％
Si is deoxidation composition main in steelmaking process, must containing more than 0.05% in order to obtain sufficient deoxidation effect.If but exceed the upper limit, can reduce the toughness of mother metal and weld, the Si existed with solution also can improve ductile-brittle transition temperature while improving intensity, and therefore Si content is 0.05% ~ 0.50%, and preferred content is 0.10% ~ 0.35%.
Mn：0.20％～1.80％
Mn ensures the intensity of steel and the bioelement of toughness, and Mn and S combines and forms MnS, avoids grain boundaries to form FeS and the thermal crack that causes, while Mn be also good reductor.But when Mn content lower than 0.20%, be then difficult to ensure above-mentioned effect, if Mn element too Gao Zehui increase the weight of strand segregation and worsen welding property, therefore Mn content should control 0.20% ~ 1.80%, and preferred content is 0.80% ~ 1.50%.
P：0.001％～0.03％
P is inevitable impurity element in steel, can worsen toughness and the welding property of steel.If especially P content is more than 0.03%, the welding property of steel significantly declines, and therefore the upper limit is 0.03%, and preferred upper limit is less than 0.018%.P can form the phosphoric acid salt as corrosion inhibitor but then, is conducive to improving the corrosion resistance nature of steel under sour environment, and therefore in order to improve erosion resistance, need containing more than P0.001% in steel, therefore P content is 0.001% ~ 0.03%.
Below S:0.015%
If S content is more than 0.015%, a large amount of MnS can be formed in steel and be mingled with, and MnS is mingled with the origin that position is tubercular corrosion, thus reduce the erosion resistance of steel, therefore will take measures S content in steel is reduced as far as possible.According to the present invention, S upper content limit is 0.015%, and preferred upper limit is 0.005%.
Al：0.01％～0.08％
The deoxidation that Al must add as the present invention and crystal grain thinning element, add content more than 0.01%, but easily produce blank hot crackle during more than 0.08%, formed and be mingled with in a large number, the toughness of steel reduces simultaneously, and therefore Al upper content limit is 0.08%, and 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 steel with solution, can significantly improve the galvanic corrosion self-potential of steel, thus suppresses the corrosion of steel under acid attack environment.But content lower than 0.01% time do not reach and effectively improve erosion resistance object, and during more than 0.20%, can be enriched in austenite grain boundary in the hot procedure such as continuous casting and rolling and high-temp plastic be reduced, therefore Sn content preferable range be 0.01% ~ 0.20%.
Sb：0.01％～0.2％
Sb is similar to Sn to improving the corrosion resistance nature effect of steel, and being proved to be the corrosion resistance nature that can effectively improve under acid attack environment, if add the corrosion resistance nature that can further improve steel together with Sn, is the optional Addition ofelements of the present invention.More than 0.2% anticorrosion effect, the saturated and thermoplasticity of steel reduces Sb content.When therefore adding, Sb content preferable range is 0.01 ~ 0.2%.
W：0.005％～0.20％
W is the Addition ofelements optionally improving erosion resistance in the present invention.W can form WO in 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 corrosion.More than 0.20%, the rear corrosive effect that suppresses reaches capacity W content, and is unfavorable for welding property, and therefore the upper limit is 0.20%.Therefore preferred W content range when the present invention adds is 0.005% ~ 0.20%.
Cr：0.005％～0.15％
Cr carries out forming fine and close Cr on steel surface along with being oxidized
2o
3layer, can suppress the negatively charged ion under acid attack environment to invade, thus reduces Cl
-deng the enrichment of negatively charged ion on steel surface.From the viewpoint of cost and anticorrosion effect, 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 improving steel, can promote that surface compact rusty scale is formed, and stops further developing of corrosion, and from the viewpoint of cost and performance anticorrosion effect, the preferred content scope of interpolation is 0.01% ~ 0.15%.
Nb：0.005％～0.05％
Nb can the grain-size of effective refinement steel, is the element added as improving the intensity of steel and toughness.Little to the performance effect of steel when Nb content is less than 0.005%, and during more than 0.05%, the welding property of steel and toughness all reduce, therefore Nb content range is 0.005% ~ 0.05%.
Ti：0.005％～0.05％、
Ti is the composition added as raising steel and weld toughness, exist with TiN form and play a role, when being less than 0.005%, effect is little, easily forms macrobead TiN and lose effect during more than 0.05%, and therefore adding Ti content range is 0.005% ~ 0.05%.
Steel of the present invention in addition to the aforementioned ingredients, surplus is made up of Fe and inevitable impurity, as long as ensure foreign matter content within the specific limits, then permission exists and can not damage anticorrosion effect and the performance of steel of the present invention, such as often add scrap smelting for reducing costs, unavoidably bring the impurity components such as Cu into, the gases such as O, N are also difficult to remove completely, therefore can allow Cu content below 0.1%, O content below 0.005%, N content is below 0.008%.
The manufacture method technical scheme of above-mentioned sour crude oil accumulating tank corrosion-resistant steel is described as follows:
The steel billet or steel ingot that meet above-mentioned chemical composition are processed into steel plate by rolling and obtain by the present invention, and preferred following methods makes steel plate:
(1) by 5 principal elements C, Si, Mn, P, S of converter adjustment steel in the scope of the invention, and add other alloying constituent as requested and carry out melting.
(2) molten steel taken out of from converter is carried out secondary refining by ladle furnace, reduce the detrimental impurity content such as O, S, nonmetal inclusion further.
(3) above-mentioned steel is made slab by continuous casting process, slab can be reheated immediately or after Slow cooling according to factory flow layout afterwards.
(4) above-mentioned plate slab is heated to is not less than 1100 DEG C but not higher than the temperature of 1250 DEG C.Be not enough to allow alloying element be dissolved into completely in austenite in the temperature lower than 1100 DEG C, the finishing temperature needed for hot rolling can not be ensured.On the other hand, can be AUSTENITE GRAIN COARSENING in the temperature higher than 1250 DEG C, will the toughness of steel plate be reduced.
(5) consider from the mechanical property requirements meeting sour crude oil accumulating tank corrosion-resistant steel, select suitable technique hot rolling, preferably 1100 ~ 950 DEG C of austenite recrystallization districts and the rolling of 920 ~ 800 DEG C of Unhydrated cement temperature two-stage controls, and ensureing that two-stage rolling accumulation draught is not less than 66%, finishing temperature is preferably 820 ~ 860 DEG C.
(6) rate of cooling of 3 ~ 15 DEG C/s scope can be selected after hot rolling according to the mechanical property demand of user to steel plate.Such as yield strength requires as 315N/mm
2other high-strength steel of higher level, and impelling strength (when temperature requirement is more than 0 DEG C, preferred hot rolling subordinate phase temperature is less than 950 DEG C, and finishing temperature is less than 850 DEG C, and the type of cooling is for cool in atmosphere.If yield strength requires as 390N/mm
2above or impelling strength temperature requirement below-20 DEG C time, then preferably hot rolling subordinate phase temperature is less than 920 DEG C, and steel plate, below 830 DEG C, is cooled to less than 650 DEG C with the rate of cooling of 5 DEG C/more than s thereafter by finishing temperature control.
The sour crude oil accumulating tank corrosion-resistant steel plate thickness that aforesaid method is made is 8 ~ 50mm, also can demonstrate excellent corrosion resistance nature not having direct use in painting anticorrosion layer situation.
Adopt sour crude oil accumulating tank corrosion-resistant steel of the present invention, there is following effect:
(1) the corrosion-resistant elemental composition design adding micro-Sn is adopted, can select to add the one kind or two or more combination in Sb, W, Cr, Mo, the galvanic corrosion self-potential of steel in high-concentration acidic wastewater solution can be significantly improved further, effective suppression sour crude oil corrosive environment is as the top steel of oil carrier oil cargo tank and the general corrosion of bottom steel and local corrosion, directly can use without the need to painting anticorrosion layer, save a large amount of coating materials and manual maintenance cost.
(2) because steel of the present invention has the corrosion resistance nature under excellent sour crude oil environment, can reduce corrosion allowance design, that reduces crude oil storage and transport process causes economy and the Ecological Loss probability of leakage because of corrosion, improves security.
(3) steel of the present invention has no special requirements to manufacturing process, adopts the manufacturing process of conventional steels, can adopt rolling flexibly and process for cooling, reduce manufacture difficulty and cost in conjunction with mechanical property requirements.
In sum, adopt sour crude oil accumulating tank corrosion-resistant steel of the present invention, for building the low cost steel under oil carrier oil cargo tank, crude oil storage tank etc. provide a kind of sour crude oil corrosive environment with excellent anticorrosive performance.
Accompanying drawing explanation
Fig. 1 is steel plate corrosion potential figure of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
Smelt carrying out compound oxygen blast at the bottom of top in converter after hot metal pretreatment, alloy material adjusting component is added after decarburization, then molten steel send ladle furnace refining and adjusts chemical composition each composition of steel as shown in table 1 embodiment 1 ~ 19, molten steel waters through Continuous casting process and casts out 230mm × 1650mm section slab, by after these heating steel billets to 1200 DEG C, carry out roughing and be the two-stage finish rolling started with 900 DEG C, rolling final temperature is 820 DEG C, naturally cooling in atmosphere after rolling, makes the steel plate that thickness is 20mm.
Table 1 invention steel and compared steel chemical composition (wt%)
The performance test of resistance to general corrosion:
From embodiment 1 ~ 19 steel plate obtained through aforesaid method; cut the rectangle sample of wide 25mm × long 60mm × thick 5mm; testing surface 600# diamond sand paper grinds; after washing and acetone cleaning, carry out the general corrosion test of simulating oil cargo tank top, test face is protected with outside surface silicone sealant.Room container top, i.e. vinylformic acid lid lower surface in the general corrosion testing apparatus above-mentioned ready sample being arranged on simulation cargo tank gaseous corrosion environment, temperature is controlled by outer chamber heater.In test, the distilled water temperature of room container remains on 36 DEG C, and specimen temperature is 50 DEG C, 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
2.The process of the test cycle is as follows: naturally cool to 25 DEG C after mixed gas heating temperatures to 50 DEG C is kept 20 hours and keep 3 hours, a loop cycle like this is 24 hours, and the gas flow of initial 24 hours is 120cc/min, remains on 30cc/min afterwards.
Need surface-area (S) and the weight of measuring every sheet sample before corrosion test, test carry out 21 days, 49 days, 77 days, 98 days afterwards every number steel take out 5 sample weighs, deduct weight after corrosion with original weight, and calculate average weightless W
21, W
49, W
77and W
98, corroded by following formulae discovery and reduce thickness CL
21, CL
49, CL
77and CL
98:
In formula, S is sample original table area (cm
2), D is density (g/cm
3), W
21, W
49, W
77and W
98be respectively 5 slice sample means 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 method of least squares meter of corrosion test after 21 days, 49 days, 77 days and 98 days, then corrosion reduces the available following formula description of relation of thickness CL and A, B:
CL＝A×t
B
In formula, A (mm) and B is coefficient, t be etching time (my god)
The life-span of such as oil carrier is 25 years, and available following formula is obtained the corrosion after 25 years and reduced thickness (ECL):
ECL(mm)＝A×(25×365)
B
Thickness E CL is reduced according to following grade evaluation according to the corrosion in 25 years that test-results is obtained:
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 resistance to general corrosion, the resistance to general corrosion of B level is functional, and C level is that resistance to general corrosion performance is qualified, the D level performance inconsistency of resistance to general corrosion lattice, and 2mm is the code requirement upper limit of International Maritime Organizaton IMO.Even if A ~ C level show steel plate can in 25 years life times not painting anticorrosion layer also can use safely.
That above-mentioned simulation oil cargo tank top general corrosion is tested the results are shown in table 2, as can be known from the results, the steel plate of embodiment 1 ~ 13 according to the invention, resistance to general corrosion performance is all good, for A ~ C level, no matter whether Sb is not being added on the other hand containing the steel of the comparative steel embodiment 14 ~ 19 of Sn, W, Cr, Mo matches element appraise and is D level, for defective, illustrate and select Addition ofelements to add together with Sn and could improve corrosion resistance nature further, it can thus be appreciated that the resistance to general corrosion of steel of the present invention is excellent, even if be used in oil carrier when not painting anticorrosion layer also can demonstrate excellent corrosion resistance nature in life span in 25 years.
Resistance to local corrosion performance experiment:
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, to specimen surface with after the grinding of 600# emery paper, after washing and acetone cleaning, makes local corrosion test's sample.Utilize corrosion testing apparatus to carry out the local corrosion test of Simulation of Crude Oil bilge portion environment, sample 0.3mm diameter nylon fishing line hangs in corrosion test solution and carries out solution soaking corrosion test.Simulated oil bilge portion acidic corrosion solution is 10wt%NaCl, with HCl adjusted to ph to 0.85, this pH value is the Schwellenwert surveyed in actual crude oil storage tank local corrosion hole, and change new soln after 24 hours, liquor capacity must be greater than 20cc/cm with the ratio of sample corroded area
2, solution temperature remains on 30 DEG C, and solution soaking test period is continuous 72 hours.Every number steel curved beam quantity is 5, test pre-test weight and surface-area, to test after 72 hours according to following formulae discovery year erosion rate:
In formula, C.R. is year erosion rate (mm/), 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).Evaluate according to such as the following level after calculating the C.R. of each steel:
A: erosion rate is less than or equal to 0.25mm/
B: more than erosion rate 0.25mm/ and be less than or equal to 0.50mm/
C: more than erosion rate 0.50mm/ and be less than or equal to 1.00mm/
D: more than erosion rate 1.00mm/
A level is that resistance to local corrosion performance is excellent, B level is that resistance to local corrosion performance is good, C level is that resistance to local corrosion performance is qualified, and D level is that resistance to local corrosion performance is defective, and 1.00mm/ Nian Shi International Maritime Organizaton IMO specification 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 painting anticorrosion layer, and D level need carry out application by coating specification.
The corrosion test of local corrosion environment bottom above-mentioned simulation oil cargo tank be the results are shown in table 2, the visible steel plate meeting the embodiment 1 ~ 13 of the scope of the invention all meets A ~ C level grade, show that steel of the present invention has excellent resistance to local corrosion performance under sour crude oil environment, even if 1 ~ No. 5 steel only adding Sn element also can make the resistance to local corrosion performance of steel reach qualified grade, add the one kind or two or more of Sb, W, Cr, Mo if select simultaneously, erosion rate can be reduced further, reach B level even A level.It can thus be appreciated that steel of the present invention not only has excellent resistance to general corrosion performance, also there is the resistance to local corrosion performance under peracidity condition, can be used for sour crude oil accumulating tank top board and base plate.
Select the steel of in embodiment 3,7,10 and 19 in the electrolytic solution of pH=0.85, carry out the test of electrochemistry corrosion potential, Fig. 1 shows the time dependent result of corrosion potential, show No. 19 steel of 3,7, No. 10 steel corrosion potentials according to the invention apparently higher than comparative example, illustrate that steel of the present invention has lower corrosion tendency under peracidity condition, compared steel is then easily corroded.7, No. 10 steel simultaneously adding Sn and other non-corrosive metal component are higher than No. 3 steel corrosion potentials adding separately Sn again, prove that selecting to add Sb, W, Cr, Mo can reduce the tendency that corrosion reaction occurs further, demonstrates the general corrosion in embodiment and local corrosion test's result.
The result of table 2 corrosion test
Claims (1)
1. a sour crude oil accumulating tank corrosion-resistant steel manufacture method, it is characterized in that its chemical composition by weight percentage containing C:0.02% ~ 0.13%, Si:0.27% ~ 0.50%, Mn:0.20% ~ 1.80%, P:0.001% ~ 0.03%, below S:0.015%, Al:0.017% ~ 0.036%, Sn:0.06% ~ 0.20%, Nb:0.021% ~ 0.05%, Ti:0.016% ~ 0.05%, surplus is made up of Fe and inevitable impurity; Comprise converter smelting, secondary refining, continuous casting, rolling and cooling, above-mentioned plate slab is heated to and is not less than 1100 DEG C but not higher than the temperature of 1250 DEG C; Adopt 1100 ~ 950 DEG C of austenite recrystallization districts and the rolling of 920 ~ 800 DEG C of Unhydrated cement temperature two-stage controls, and ensure that two-stage rolling accumulation draught is not less than 66%, finishing temperature is 820 ~ 860 DEG C; Rate of cooling 3 ~ 15 DEG C/S, steel plate thickness is 8 ~ 50mm.
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| CN103290186B (en) * | 2013-06-14 | 2015-01-21 | 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 |
| JP6492793B2 (en) * | 2015-03-09 | 2019-04-03 | 新日鐵住金株式会社 | Steel material, steel structure for embedding in soil, and method for manufacturing 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 |
| 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 |
| 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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| JP2007291494A (en) * | 2006-03-30 | 2007-11-08 | Jfe Steel Kk | Corrosion-resistant steel material for crude oil storage tank, and crude oil storage tank |
| CN101928885A (en) * | 2009-06-26 | 2010-12-29 | 上海梅山钢铁股份有限公司 | Hydrothion corrosion resistant pipe steel and production method thereof |
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| CN101928885A (en) * | 2009-06-26 | 2010-12-29 | 上海梅山钢铁股份有限公司 | Hydrothion corrosion resistant pipe steel and production method thereof |
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