JP2924584B2 - Durable ballast tank - Google Patents
Durable ballast tankInfo
- Publication number
- JP2924584B2 JP2924584B2 JP19673293A JP19673293A JP2924584B2 JP 2924584 B2 JP2924584 B2 JP 2924584B2 JP 19673293 A JP19673293 A JP 19673293A JP 19673293 A JP19673293 A JP 19673293A JP 2924584 B2 JP2924584 B2 JP 2924584B2
- Authority
- JP
- Japan
- Prior art keywords
- ballast tank
- less
- steel
- corrosion
- seawater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【0001】[0001]
【産業上の利用分野】本発明は原油タンカーや鉱炭船等
の船舶におけるバラストタンクに関するものであり、耐
食材料と樹脂被覆を組み合わせた、耐久性バラストタン
クに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballast tank for a ship such as a crude oil tanker or a coal ship, and more particularly to a durable ballast tank combining a corrosion-resistant material and a resin coating.
【0002】[0002]
【従来の技術】タンカーや貨物輸送船等の船舶は、空荷
の時でも船体が安定するようバラストタンクに海水を積
載している。このためバラストタンク内は、海水あるい
は海水飛沫あるいは蒸発した水分の凝縮水による腐食に
曝される。そのため、従来は没水部に関しては、犠牲陽
極によるカソード防食、さらにはタールエポキシ塗装を
施している。また、タンクの空間部側壁および天井部分
は、カソード防食の効果がないため、タールエポキシ塗
装により防食していた。ところが、この空間部は、乾湿
繰り返しを受けるとともに、日中においては温度も上昇
し易く、非常に苛酷な腐食環境になっている。2. Description of the Related Art Ships, such as tankers and cargo transport ships, load seawater in ballast tanks so that the hull is stable even when empty. For this reason, the inside of the ballast tank is exposed to corrosion due to seawater, seawater splashes, or condensed water of evaporated water. For this reason, conventionally, the submerged portion has been subjected to cathodic protection using a sacrificial anode, and further to a tar epoxy coating. In addition, since the side wall and the ceiling of the space part of the tank do not have the effect of cathodic protection, they were protected by tar epoxy coating. However, this space is subjected to repeated wet and dry, and the temperature tends to rise during the day, resulting in a very severe corrosive environment.
【0003】このため従来のタールエポキシ塗装におい
ては7〜10年程度の寿命しかなく、その後は補修、塗
り替え等を余儀なくされていた。近年、タンカーは、座
礁時の油流出の防御のためダブルハル化が進められてお
り、二重船底部分がバラストタンクとして使用されるた
め、タンクの保守点検、補修や塗り替えが非常に困難か
つ高コストになりつつある。For this reason, the conventional tar epoxy coating has a life of only about 7 to 10 years, and after that, repairs, repainting and the like have been forced. In recent years, tankers have been converted to double hulls to prevent oil spills when stranded, and the double bottom of the tanker is used as a ballast tank, making it extremely difficult and expensive to maintain, inspect, repair and repaint tanks. It is becoming.
【0004】通常、船舶の使用期間は20〜30年のた
め、この期間メンテナンスを必要としない経済的な防食
法の開発が望まれていた。[0004] Normally, the service period of a ship is 20 to 30 years. Therefore, it has been desired to develop an economical anticorrosion method which does not require maintenance during this period.
【0005】[0005]
【発明が解決しようとする課題】本発明の課題は、船舶
の使用期間において、メンテナンスを必要としない耐久
性を有するバラストタンクを経済性を損なうことなく提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a durable ballast tank which does not require maintenance during use of a ship, without impairing economic efficiency.
【0006】[0006]
【課題を解決するための手段】発明者らは、鋭意検討の
結果、バラストタンクの構成材料としてCu、Niおよ
びP等の耐食性改善元素を添加した低合金耐食鋼材を使
用し、腐食環境の厳しい水面上の空間部では、塗装と併
用することにより耐食性に優れたバラストタンクが得ら
れることを見いだした。As a result of intensive studies, the present inventors have used low-alloy corrosion-resistant steel materials to which corrosion-resistant elements such as Cu, Ni, and P are added as constituent materials for ballast tanks, and have a severe corrosion environment. In the space above the water surface, it has been found that a ballast tank with excellent corrosion resistance can be obtained when used in combination with painting.
【0007】すなわち、海水中においては、低合金鋼中
のCu、NiおよびPの効果により、裸使用でも十分な
耐食性を保持し、空間部においても鋼材自身の耐食性向
上により防食塗装の寿命が延命される結果、船舶の使用
期間である20〜30年間、メンテナンスフリーで使用
できる耐食性に優れたバラストタンクの発明に至ったも
のである。That is, in seawater, due to the effects of Cu, Ni and P in the low alloy steel, sufficient corrosion resistance is maintained even in bare use, and the life of the anticorrosion coating is prolonged even in the space due to the improvement of the corrosion resistance of the steel itself. As a result, the invention of a ballast tank excellent in corrosion resistance that can be used without maintenance for 20 to 30 years, which is the service period of the ship, has been reached.
【0008】上述の課題解決手段としての本発明の構成
は以下のとおりである。すなわち、 1.バラストタンクが、C:0.15%以下,Si:0.
02〜1.5%,Mn:0.2〜5.0%,P:0.03〜
0.10%、S:0.005%以下,Cu:0.1〜1.0
%,Ni:0.2〜1.0%を含み残部は実質的にFeお
よび不可避の不純物からなる低合金鋼を構成材料とし、
その空間部内壁が150μm以上の膜厚で樹脂被覆され
ていることを特徴とする耐久性に優れたバラストタン
ク。[0008] The configuration of the present invention as means for solving the above-mentioned problems is as follows. That is, 1. Ballast tank: C: 0.15% or less, Si: 0.1%
02 to 1.5%, Mn: 0.2 to 5.0%, P: 0.03 to
0.10%, S: 0.005% or less, Cu: 0.1 to 1.0
%, Ni: 0.2-1.0%, and the balance is made of low alloy steel substantially composed of Fe and unavoidable impurities,
A ballast tank having excellent durability, wherein the inner wall of the space is coated with a resin having a thickness of 150 μm or more.
【0009】2.上記1において、構成材料がさらにM
o:0.05〜1.0%,V:0.05〜1.0%、W:0.
05〜1.0%の内の1種または2種以上を含むことを
特徴とする耐久性に優れたバラストタンク。[0009] 2. In the above item 1, the constituent material is M
o: 0.05 to 1.0%, V: 0.05 to 1.0%, W: 0.2%
A ballast tank having excellent durability, comprising one or two or more kinds in a range of from 0.05 to 1.0%.
【0010】3.上記1または2において、構成材料が
さらにAl:0.02〜1.0%を含むことを特徴とする
耐久性に優れたバラストタンク。[0010] 3. The ballast tank having excellent durability according to 1 or 2, wherein the constituent material further contains 0.02 to 1.0% of Al.
【0011】4.上記1ないし3のうちのいずれか1項
において、構成材料がさらにTi:0.01〜0.5%を
含むことを特徴とする耐久性に優れたバラストタンク。4. 4. A ballast tank excellent in durability according to any one of the above items 1 to 3, wherein the constituent material further contains Ti: 0.01 to 0.5%.
【0012】[0012]
【作 用】本発明に使用するCu−Ni−P含有低合金
鋼の各合金元素の含有量を限定した理由を以下に述べ
る。The reason why the content of each alloy element in the Cu-Ni-P-containing low alloy steel used in the present invention is limited will be described below.
【0013】(1) Cは、鋼の強度を高める効果を有
するが、多量に添加すると溶接性が劣化するため多量の
添加は好ましくないので、0.15%以下の添加量とし
た。[0013] (1) C has the effect of increasing the strength of the steel, the large amount of the addition of a large amount for weldability deteriorates a preferred Ino added and the addition amount of 0.15% or less.
【0014】(2) Siは、脱酸元素として必要であ
り、また耐海水性を向上させる有効元素でもある。その
ため、0.02%以上の添加が必要であるが、1.5%を
超えると熱間加工性が劣化するため0.02〜1.5%の
添加とした。(2) Si is necessary as a deoxidizing element and is also an effective element for improving seawater resistance. Therefore, the addition of 0.02% or more is necessary, but if it exceeds 1.5%, the hot workability deteriorates, so the addition was made 0.02 to 1.5%.
【0015】(3) Mnは、鋼の機械的性質を確保す
るとともに耐海水性を改善せしめる有効元素である。し
かし、その量が0. 2%未満ではその効果が小さくまた
5%を超えると、逆に耐海水性が低下するため0.2〜
5.0%の添加とした。(3) Mn is an effective element that secures the mechanical properties of steel and improves seawater resistance. However, if the amount is less than 0.2%, the effect is small, and if it exceeds 5%, on the contrary, the seawater resistance decreases, so
5.0% was added.
【0016】(4) Pは溶接性を劣化させる元素であ
り、その添加量が0.1%を超えると悪影響が顕著にな
る。しかし、一方Pは、耐海水性を向上させる基本有効
元素でもあり、その効果は0.03%未満では発揮され
ない。そのため、0.03〜0.1%の添加とした。さら
に、PはPO4 3-として鉄さび中に吸着され、さび層を
カチオン選択的な性質とすることで腐食に有害なアニオ
ンであるCl-の鋼表面への侵入を抑制し腐食速度を低
下させる作用がある。(4) P is an element that deteriorates the weldability, and if the added amount exceeds 0.1%, the adverse effect becomes significant. However, P is also a basic effective element for improving seawater resistance, and its effect is not exhibited at less than 0.03%. Therefore, it was added in an amount of 0.03 to 0.1%. Moreover, P is adsorbed into the iron rust as PO 4 3-, Cl detrimental anion corrosion by rust layer and a cation selective nature - reducing the suppressing corrosion rate of penetration into the steel surface There is action.
【0017】(5) Sは耐食性に悪影響をおよぼす元
素である。これは、腐食の起点となる非金属介在物のM
nSを生成し、そのMnSは、海水中で溶解すると
S2-,HS-, H2Sになり、鋼のアノード溶解を促進さ
せるからである。MnSの生成を防止するには、Sは少
ないほどよく、そのため0.005%以下の含有とす
る。(5) S is an element that has an adverse effect on corrosion resistance. This is due to the non-metallic inclusions
This is because nS is produced, and the MnS becomes S 2− , HS − , H 2 S when dissolved in seawater, and promotes the anodic dissolution of steel. In order to prevent the formation of MnS, the smaller the amount of S, the better. Therefore, the content is 0.005% or less.
【0018】(6) Cuは鋼の耐海水性を高め、特に
孔食等の局部腐食の成長を抑制せしめる有効元素であ
る。その添加量が、0.1%未満では効果が発揮され
ず、一方1.0%を超えると熱間加工性が劣化する。特
にCuは溶接部の耐食性改善にも有効である。そのた
め、0.1%以上の添加が必要である。これらの理由に
より、Cuを0.1〜1.0%の添加とした。(6) Cu is an effective element which increases the seawater resistance of steel and suppresses the growth of local corrosion such as pitting corrosion. If the added amount is less than 0.1%, no effect is exhibited, while if it exceeds 1.0%, hot workability is deteriorated. In particular, Cu is also effective for improving the corrosion resistance of the weld. Therefore, it is necessary to add 0.1% or more. For these reasons, 0.1 to 1.0% of Cu was added.
【0019】(7) NiはCuと同様の効果を発揮す
る元素であり、特に局部アノードのようなpHの低下し
た孔食の成長段階での耐食性を高め、局部腐食の進行を
抑制する。またCuと共存することにより著しくその効
果を発揮する。 Niの添加量が0.20%未満ではそ
の効果は不十分であり、一方1.0%を超えるとその熱
間加工性が劣化する。したがって、Ni添加量は0.2
0〜1.0%の添加とした。(7) Ni is an element exhibiting the same effect as Cu, and particularly enhances the corrosion resistance at the growth stage of pits having a reduced pH, such as a local anode, and suppresses the progress of local corrosion. Also, its effect is remarkably exhibited by coexisting with Cu. If the amount of Ni is less than 0.20%, the effect is insufficient, while if it exceeds 1.0%, the hot workability is deteriorated. Therefore, the amount of Ni added is 0.2.
0 to 1.0% was added.
【0020】(8)Moは鋼の耐海水性を向上せしめる
有効元素である。MoはMoO4 2-イオンとして溶解し
局部アノードでのインヒビターとして作用するととも
に、錆中に含まれるCl-イオンの透過性を低下させる
ことで耐食性を改善せしめる。その添加量が0.05%
未満ではその効果が十分でなく、また1.0%を超えて
添加してもその効果は飽和するため経済性で不利とな
る。そのためMo添加量は0.05〜1.0%の範囲が好
ましい。(8) Mo is an effective element for improving the seawater resistance of steel. Mo dissolves as MoO 4 2− ions and acts as an inhibitor at the local anode, and also improves corrosion resistance by reducing the permeability of Cl − ions contained in rust. The amount added is 0.05%
If the amount is less than 1.0%, the effect is not sufficient, and even if added over 1.0%, the effect is saturated, which is disadvantageous in economy. Therefore, the addition amount of Mo is preferably in the range of 0.05 to 1.0%.
【0021】(9) VもほぼMoと同様の作用によ
り、鋼の耐海水性を改善する元素である。Moの場合と
同様、その酸素酸アニオン(VO4 3-、V2O7 4-)の生
成により、その効果を発揮する。そのため、Moと同様
に0.05〜1.0%の範囲の添加が好ましい。(9) V is an element that improves the seawater resistance of steel by substantially the same action as Mo. As in the case of Mo, the oxygen anion (VO 4 3-, V 2 O 7 4-) by the production of, exert their effects. Therefore, like Mo, addition in the range of 0.05 to 1.0% is preferable.
【0022】(10) WもMoとほぼ同様の作用によ
り、鋼の耐海水性を改善する元素である。Moの場合と
同様、その酸素酸アニオン(WO4 2-)の生成により、
その効果を発揮する。そのため、Moと同様に0.05
〜1.0%の範囲の添加が好ましい。(10) W is an element that improves the seawater resistance of steel by substantially the same action as Mo. As in the case of Mo, generation of the oxygen acid anion (WO 4 2- )
Demonstrate its effect. Therefore, like Mo, 0.05
Addition in the range of ~ 1.0% is preferred.
【0023】(11) Alは、Siと同様、鋼の耐海水
性を高める元素であり、0.02%未満ではその効果が
十分ではなく,また1.0%を超えて添加すると鋼の熱
間加工性を損なうので、Al添加量は0.02〜1.0%
の範囲が好ましい。(11) Al, like Si, is an element that enhances the seawater resistance of steel. If its content is less than 0.02%, its effect is not sufficient. Since the workability is impaired, the amount of Al added is 0.02 to 1.0%.
Is preferable.
【0024】(12) Tiは、その添加によりSの大半
をTiSとして固定し、海水腐食の起点となるMnSの
生成を抑制することで耐海水性を高める。0.01%未
満ではその効果は発揮されず、0.5%を超えて添加し
ても耐海水性改善効果は飽和に達するため、Ti添加量
は0.01〜0.5%の範囲が好ましい。(12) By adding Ti, most of S is fixed as TiS, and the generation of MnS, which is a starting point of seawater corrosion, is suppressed to enhance the seawater resistance. If it is less than 0.01%, the effect is not exhibited, and even if it is added more than 0.5%, the effect of improving seawater resistance reaches saturation. Therefore, the amount of Ti added is preferably in the range of 0.01 to 0.5%. preferable.
【0025】次に樹脂被覆について述べる。樹脂被覆材
料としては、特に限定されるものではなく、通常使用さ
れる防食塗料が使用できる。具体的には、タールエポキ
シ塗料、ピュアエポキシ塗料、無溶剤型エポキシ塗料、
ウレタン塗料等が例示される。Next, the resin coating will be described. The resin coating material is not particularly limited, and a commonly used anticorrosive paint can be used. Specifically, tar epoxy paint, pure epoxy paint, solventless epoxy paint,
Examples include urethane paints.
【0026】また、被覆膜厚を150μm以上と限定し
た理由は、150μm未満の被覆膜厚では、被覆にピン
ホールが発生しやすく防食性に劣るからである。The reason why the coating thickness is limited to 150 μm or more is that if the coating thickness is less than 150 μm, pinholes are easily formed in the coating and the anticorrosion property is poor.
【0027】被覆膜厚の上限は特に限定されないが、通
常500μm以下である。船舶の供用年限は通常20〜
30年までであり、500μm以下の被覆膜厚でも、本
発明による低合金鋼との組み合わせにより、再塗装する
ことなく十分に防食機能を維持できるからである。ま
た、500μmを超える被覆を行うと経済性も損なわれ
てくるため、被覆膜厚は150〜500μmの範囲が好
ましい。The upper limit of the coating film thickness is not particularly limited, but is usually 500 μm or less. The service life of ships is usually 20-
This is because the combination with the low alloy steel according to the present invention can sufficiently maintain the anticorrosion function without repainting even up to 30 years, even with a coating thickness of 500 μm or less. Further, if the coating exceeds 500 μm, the economy is impaired, so that the coating thickness is preferably in the range of 150 to 500 μm.
【0028】本発明では、合金元素添加により下地金属
の耐食性が向上するため、樹脂被覆の接着劣化寿命が延
長し、その結果、船舶の供用期間である20〜30年に
わたってメンテナンスを不要にすることが可能になっ
た。In the present invention, the corrosion resistance of the base metal is improved by the addition of the alloying element, so that the adhesive deterioration life of the resin coating is extended, and as a result, maintenance is not required for the service period of 20 to 30 years of the ship. Is now possible.
【0029】[0029]
【実施例】以下、本発明を実施例により説明する。表1
に示す組成を有する150×70×3mmの鋼材を準備
し、サンドブラスト処理したあと、タールエポキシ塗料
(神東塗料製オピヤ3000S)あるいはピュアエポキ
シ塗料(神東塗料製WS−10)を乾燥膜厚で所定の膜
厚になるようにエアレスプレー塗装を行った。The present invention will be described below with reference to examples. Table 1
After preparing a steel material of 150 × 70 × 3 mm having the composition shown in FIG. 1 and sandblasting, a tar epoxy paint (Opia 3000S manufactured by Shinto Paint) or a pure epoxy paint (WS-10 manufactured by Shinto Paint) is dried to a film thickness. Airless spray coating was performed to a predetermined film thickness.
【0030】[0030]
【表1】 [Table 1]
【0031】この試験片の端面および裏面を、同種の塗
料で乾燥膜厚約500μmになるようにシールして耐食
性試験を行った。The end face and the back face of the test piece were sealed with the same kind of paint so as to have a dry film thickness of about 500 μm, and a corrosion resistance test was performed.
【0032】耐食性試験は、複合サイクル試験を行い、
その条件は、35℃塩水噴霧試験8時間、50℃3%N
aCl浸漬試験8時間、50℃乾燥8時間のサイクルで
ある。本試験の20サイクルは、バラストタンク内腐食
環境の1年に相当するものと考えられる。この試験を最
高600サイクル行い、経時的に有機樹脂被膜の劣化状
況を観察し、浮きやはがれ等の劣化が発生するサイクル
数で評価した。評価は、劣化開始が400サイクル以上
のものを合格とした。In the corrosion resistance test, a combined cycle test is performed,
The conditions were as follows: 35 ° C. salt spray test 8 hours, 50 ° C. 3% N
This is a cycle of an aCl immersion test for 8 hours and drying at 50 ° C. for 8 hours. It is considered that 20 cycles of this test correspond to one year of the corrosive environment in the ballast tank. This test was performed for up to 600 cycles, and the deterioration state of the organic resin film was observed over time, and evaluated by the number of cycles at which deterioration such as floating or peeling occurred. In the evaluation, those having a deterioration start of 400 cycles or more were regarded as acceptable.
【0033】耐食性試験の結果を併せて表1に示す。実
施例1〜25では、Cu,Ni,Pを主とした添加合金
元素の影響で、防食性が向上していることがわかる。実
施例4〜10等に認められるように、Cu,Ni,P以
外の他の添加元素との相乗効果で耐食性が一段と向上し
ている。Table 1 also shows the results of the corrosion resistance test. In Examples 1 to 25, it can be seen that the anticorrosion property is improved due to the influence of the added alloy element mainly composed of Cu, Ni, and P. As can be seen in Examples 4 to 10, etc., the corrosion resistance is further improved due to the synergistic effect with the additional elements other than Cu, Ni, and P.
【0034】一方、樹脂膜厚が薄かったり添加元素の含
有量が特許請求範囲外のものは、防食性に劣り、複合サ
イクル試験400サイクル未満で樹脂被覆に劣化が生じ
る。特に比較例33に示すSS−41鋼板を用いた場合
は、有効添加元素が少なく、性能が非常に劣ることがわ
かる。On the other hand, when the resin film thickness is small or the content of the additional element is out of the range of the claims, the anticorrosion property is inferior, and the resin coating deteriorates in less than 400 cycles of the combined cycle test. In particular, when the SS-41 steel sheet shown in Comparative Example 33 was used, it was found that the effective addition elements were small and the performance was very poor.
【0035】[0035]
【発明の効果】以上の説明から明らかなごとく本発明に
よるバラストタンクは、低合金鋼と防食塗装を組み合わ
せることにより優れた防食性を有しており、20年以上
の長期にわたって、メンテナンスフリーを実現でき、経
済性にも優れるため、その適用が期待されるものであ
る。As is clear from the above description, the ballast tank according to the present invention has excellent anticorrosion properties by combining low-alloy steel and anticorrosion coating, and is maintenance-free for a long period of more than 20 years. It is expected to be applicable because it is possible and has excellent economic efficiency.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) C22C 38/00 - 38/60 B63B 11/04 B32B 15/08 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) C22C 38/00-38/60 B63B 11/04 B32B 15/08
Claims (4)
下,Si:0.02〜1.5%,Mn:0.2〜5.0%,
P:0.03〜0.10%、S:0.005%以下,C
u:0.1〜1.0%,Ni:0.2〜1.0%を含み残部
は実質的にFeおよび不可避の不純物からなる低合金鋼
を構成材料とし、その空間部内壁が150μm以上の膜
厚で樹脂被覆されていることを特徴とする耐久性に優れ
たバラストタンク。1. The ballast tank contains C: 0.15% or less, Si: 0.02 to 1.5%, Mn: 0.2 to 5.0%,
P: 0.03 to 0.10%, S: 0.005% or less, C
u: 0.1 to 1.0%, Ni: 0.2 to 1.0%, and the balance is made of low alloy steel substantially composed of Fe and unavoidable impurities, and the inner wall of the space is 150 μm or more. A ballast tank with excellent durability characterized by being coated with a resin having a film thickness of.
o:0.05〜1.0%、V:0.05〜1.0%、W:
0.05〜1.0%のうちの1種または2種以上を含むこ
とを特徴とする耐久性に優れたバラストタンク。2. The method according to claim 1, wherein the constituent material further comprises M
o: 0.05 to 1.0%, V: 0.05 to 1.0%, W:
A ballast tank having excellent durability, comprising one or more of 0.05 to 1.0%.
さらにAl:0.02〜1.0%を含むことを特徴とする
耐久性に優れたバラストタンク。3. The ballast tank according to claim 1, wherein the constituent material further contains Al: 0.02 to 1.0%.
において、構成材料がさらにTi:0.01〜0.5%を
含むことを特徴とする耐久性に優れたバラストタンク。4. The ballast tank having excellent durability according to claim 1, wherein the constituent material further contains 0.01 to 0.5% of Ti.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19673293A JP2924584B2 (en) | 1993-07-15 | 1993-07-15 | Durable ballast tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19673293A JP2924584B2 (en) | 1993-07-15 | 1993-07-15 | Durable ballast tank |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0734197A JPH0734197A (en) | 1995-02-03 |
JP2924584B2 true JP2924584B2 (en) | 1999-07-26 |
Family
ID=16362674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19673293A Expired - Lifetime JP2924584B2 (en) | 1993-07-15 | 1993-07-15 | Durable ballast tank |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2924584B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005100625A1 (en) * | 2004-04-14 | 2005-10-27 | Sumitomo Metal Industries, Ltd. | Steel product for cargo oil tank |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5318550B2 (en) * | 2008-12-11 | 2013-10-16 | 株式会社神戸製鋼所 | Painted steel material for ballast tanks with excellent paint film blistering resistance, and ballast tanks and ships using the same |
JP4502075B1 (en) | 2008-12-24 | 2010-07-14 | Jfeスチール株式会社 | Corrosion resistant steel for crude oil tankers |
-
1993
- 1993-07-15 JP JP19673293A patent/JP2924584B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005100625A1 (en) * | 2004-04-14 | 2005-10-27 | Sumitomo Metal Industries, Ltd. | Steel product for cargo oil tank |
Also Published As
Publication number | Publication date |
---|---|
JPH0734197A (en) | 1995-02-03 |
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