JPH01234583A - Method for preventing discoloration of steel sheet - Google Patents
Method for preventing discoloration of steel sheetInfo
- Publication number
- JPH01234583A JPH01234583A JP6080088A JP6080088A JPH01234583A JP H01234583 A JPH01234583 A JP H01234583A JP 6080088 A JP6080088 A JP 6080088A JP 6080088 A JP6080088 A JP 6080088A JP H01234583 A JPH01234583 A JP H01234583A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- discoloration
- contg
- steel plate
- compd
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000002845 discoloration Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 13
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 10
- 125000003277 amino group Chemical group 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000003112 inhibitor Substances 0.000 claims description 11
- 239000008237 rinsing water Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- -1 monoethanolamine Chemical class 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 3
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 abstract description 3
- WWZKQHOCKIZLMA-UHFFFAOYSA-N Caprylic acid Natural products CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 abstract description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001414 amino alcohols Chemical class 0.000 abstract description 2
- GONOPSZTUGRENK-UHFFFAOYSA-N benzyl(trichloro)silane Chemical compound Cl[Si](Cl)(Cl)CC1=CC=CC=C1 GONOPSZTUGRENK-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001735 carboxylic acids Chemical class 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 239000000174 gluconic acid Substances 0.000 abstract description 2
- 235000012208 gluconic acid Nutrition 0.000 abstract description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N n-hexanoic acid Natural products CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 abstract description 2
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical group NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 abstract 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 1
- 150000001412 amines Chemical class 0.000 abstract 1
- 229920000768 polyamine Polymers 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical class NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000004279 alanine Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000004649 discoloration prevention Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920001308 poly(aminoacid) Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は鋼板、特に薬液洗浄や電解洗浄により表面が
活性化された鋼板の変色を防止する方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of preventing discoloration of a steel plate, particularly a steel plate whose surface has been activated by chemical cleaning or electrolytic cleaning.
鋼板の種類は多岐にわたり、熱間圧延、冷間圧延、焼鈍
、めっき、塗装などの各工程で製品として出荷される。There are many different types of steel sheets, and they are shipped as products after undergoing various processes such as hot rolling, cold rolling, annealing, plating, and painting.
各々の工程では、鋼板表面を清浄にする目的で、酸洗浄
、アリカリ洗浄等。薬剤洗浄や、電解洗浄などが施され
る。これらの洗浄後は、表面に付着している不純物を除
去するために、工業用水や純水などにより洗浄（リンス
）される。In each process, acid cleaning, alkali cleaning, etc. are performed to clean the surface of the steel plate. Chemical cleaning, electrolytic cleaning, etc. are performed. After these cleanings, the surface is cleaned (rinsed) with industrial water, pure water, etc. in order to remove impurities adhering to the surface.
上記洗浄で清浄になった鋼板は、表面が活性化されてい
るため、腐食が起りやすくなっており、製品が発錆によ
り変色を生ずる。発錆、変色した鋼板は製品価値が低下
するのみならず、後工程に対する悪影響、例えばめっき
不良などを引き起す。発錆、変色した鋼板は、不良部の
切断による製品歩留の低下（不良率数チに達する場合が
ある）や、洗浄のやり直しによる工程増加により多大な
損失を招く。不良品が発生するのは、主として低速運転
時やライン停止時である。これらの対策としては、ルー
パーを利用した酸洗、冷間圧延の連続化や、ＣＡＬ、Ｃ
ＡＰＬと呼ばれる連続焼鈍設備が実用化されており、上
記障害は軽減されている。Since the surface of the steel plate that has been cleaned by the above cleaning is activated, corrosion is more likely to occur, and the product becomes discolored due to rusting. Rusted or discolored steel sheets not only reduce product value, but also cause adverse effects on subsequent processes, such as poor plating. Rusted or discolored steel sheets cause significant losses due to reduced product yield due to defective parts being cut (the defective rate may reach several tens of millions) and additional steps due to re-cleaning. Defective products mainly occur during low-speed operation or when the line is stopped. These measures include continuous pickling and cold rolling using a looper, CAL, C
Continuous annealing equipment called APL has been put into practical use, and the above-mentioned problems have been alleviated.
しかしながら、全ての場合釦設備的に対応できる訳では
なく、例えば高級鋼の製造には、非連続式の電解洗浄が
行われている。この場合は次のコイルを洗浄するのに溶
接が必要になり、通常３〜５分ラインが停止する。また
溶接不良などにより低速運転が余儀なくされる場合があ
り、不良品が発生しているのが現状である。However, this is not possible in all cases using button equipment; for example, in the production of high-grade steel, discontinuous electrolytic cleaning is performed. In this case, welding is required to clean the next coil, which usually shuts down the line for 3 to 5 minutes. In addition, low-speed operation may be forced due to poor welding or the like, resulting in the production of defective products.
本発明者はこれらの問題を解決するために、洗浄水用鋼
板変色防止剤の研究を行ない、特定の化合物が良好な効
果を発揮することを見い出した。In order to solve these problems, the present inventor conducted research on steel plate discoloration inhibitors for use in cleaning water and found that a specific compound exhibits good effects.
しかしながら、上記の研究をさらに継続して行なった結
果、鋼板がリンス水槽に浸漬している間にラインが停止
すると、リンス水の気液界面や、液面上部の蒸気接触部
（リンス水槽は通常８０℃程度に維持されている）で発
錆による変色が起る場合があることがわかった０
〔問題点を解決するための手段〕
この発明はこのような問題を解決し、より確実に鋼板の
変色防止を行なうことができる方法を提供することを目
的とする。However, as a result of further continuation of the above research, we found that if the line is stopped while the steel plate is immersed in the rinsing water tank, the gas-liquid interface of the rinsing water and the vapor contact area above the liquid surface (the rinsing water tank is normally It has been found that discoloration due to rust may occur when the temperature is maintained at around 80°C. The object of the present invention is to provide a method that can prevent discoloration of
この発明は、鋼板を鋼板変色防止剤含有液と接触させた
後、さらにアミノ基またはカルボキシル基を持つ化合物
を含むリンス水と接触させることを特徴とする鋼板の変
色防止方法である。The present invention is a method for preventing discoloration of a steel plate, which is characterized in that the steel plate is brought into contact with a liquid containing a steel plate discoloration inhibitor, and then further brought into contact with rinsing water containing a compound having an amino group or a carboxyl group.
この発明の対象となる鋼板は薬品洗浄や電解洗浄などに
より、表面が活性化している鋼板である。The steel sheet to which this invention is applied is a steel sheet whose surface has been activated by chemical cleaning, electrolytic cleaning, or the like.
先ず、この発明では、このように活性化状態にある鋼板
に鋼板変色防止剤含有液と接触させて、その表面に、一
種の防食被膜を形成する。First, in the present invention, a steel plate in an activated state is brought into contact with a liquid containing a steel plate discoloration inhibitor to form a type of anticorrosion coating on its surface.
この発明に用いられる鋼板用変色防止剤としては、ペン
タエチレンヘキサミンなどのポリアミノ、モノエタノー
ルアミノなどのアミノアルコール、アラニンなどのアミ
ノカルボン（ｆｌ、ドデカンニ酸などのカルボン酸、ク
ルコン酸などのオキシカルボン酸、およびこれら酸の水
溶性塩から選ばれる少くとも１種の化合物が挙げられる
。また、ヒドラジンや亜硫酸塩などの脱酸素剤も単独で
、或いは前記化合物と併用して使用することができる。The anti-discoloration agents for steel sheets used in this invention include polyamino acids such as pentaethylenehexamine, amino alcohols such as monoethanolamino, aminocarboxylic acids such as alanine, carboxylic acids such as dodecanedioic acid, and oxycarboxylic acids such as curconic acid. , and water-soluble salts of these acids.Oxygen scavengers such as hydrazine and sulfites can also be used alone or in combination with the above compounds.
鋼板用変色防止剤と鋼板との接触方法としては、特に制
限されないが、塗布や噴霧による方法が実用的である。The method of contacting the steel sheet discoloration inhibitor with the steel sheet is not particularly limited, but methods such as coating or spraying are practical.
いずれの場合にも、ライン運転中は接触時間が長くない
ことから、比較的高濃度の添加を要する。具体的には１
０００１４／１以上とした方がよい。In either case, since the contact time is not long during line operation, a relatively high concentration of addition is required. Specifically 1
It is better to set it to 00014/1 or more.
こうして、鋼板変色防止剤で表面が覆われた鋼板は、リ
ンス槽に送られる。In this way, the steel plate whose surface is covered with the steel plate discoloration inhibitor is sent to a rinsing tank.
リンス槽内のリンス水は通常５０〜８０℃に加温されて
いるが、ここに前記鋼板変色防止剤の作用を補強するた
めに、アミノ基やカルボキシル基を有する化合物を添加
する。The rinsing water in the rinsing tank is usually heated to 50 to 80°C, and a compound having an amino group or a carboxyl group is added thereto in order to reinforce the action of the steel sheet discoloration inhibitor.
アミノ基含有化合物としてはアンモニアや、ンクロヘキ
シルアミノなどのアミノ系化合物が、また、カルボキシ
ル基含有化合物としては、グルコン酸、クエン酸、ヘキ
サン酸、ヘゲトン酸、ドデカン酸などがそれぞれ例示さ
れる。Examples of the amino group-containing compound include ammonia and amino compounds such as cyclohexylamino, and examples of the carboxyl group-containing compound include gluconic acid, citric acid, hexanoic acid, hegetonic acid, and dodecanoic acid.
リンス水への添加量は、通常１００〜５００■／ｌ程度
である。５００ ｍ’／／７１！を超えても効果がほぼ
一定となり不経済である。The amount added to the rinse water is usually about 100 to 500 μ/l. 500 m'//71! Even if the amount exceeds 1, the effect remains almost constant and is uneconomical.
なお、後工程に焼鈍工程がある場合には、多量の有機酸
はカーボン汚れの原因となり、また、アンモニアも窒化
の原因となる場合があるので、アミノ類やさらに、アミ
ノ類と、比較的低濃度の有機酸との併用が好ましい。In addition, if there is an annealing process in the subsequent process, a large amount of organic acid may cause carbon stains, and ammonia may also cause nitridation. Preferably, it is used in combination with concentrated organic acids.
なお、この発明においては、鋼板変色防止剤と、リンス
水に添加するアミノ基またはカルボキシル基含有化合物
とは同じ物を用いても良い。この場合には、使用する濃
度が異なることになる。In this invention, the steel plate discoloration inhibitor and the amino group- or carboxyl group-containing compound added to the rinse water may be the same. In this case, the concentrations used will be different.
このような構成により、この発明ではリンス槽内、リン
ス水の気液界面およびリンス水面上部の蒸気接触部のい
ずれの場所においても、鋼板の発錆による変色を防止す
ることができる。With such a configuration, the present invention can prevent discoloration of the steel plate due to rusting anywhere in the rinsing tank, at the vapor-liquid interface of the rinsing water, and at the steam contact area above the rinsing water surface.
鋼板変色防止剤が鋼板面に付着して一種の防食皮膜を形
成するとともに、リンス水と接触することにより、アミ
ノ基またはカルボキシル基含有化合物と相乗作用が発揮
されて防食被膜をより強固なものとすると推定される。The steel plate discoloration inhibitor adheres to the steel plate surface and forms a kind of anti-corrosion film, and when it comes into contact with the rinsing water, it acts synergistically with compounds containing amino groups or carboxyl groups, making the anti-corrosion film stronger. It is estimated that
電解洗浄後の冷延鋼板を切断したもの
（Ｎ６３Ｃ５０Ｘ１００Ｘ０．４醪厚さ）を試験片とし
た。A test piece was prepared by cutting a cold-rolled steel plate after electrolytic cleaning (N63C50X100X0.4 thickness).
この試験片をトルエンによる超音波脱脂３０分後、汚れ
をふきとる。次に２０℃の厚木市水に第１表に示した鋼
板変色防止剤を所定量添加した液に試験片を１分間浸漬
して接触させた。After ultrasonic degreasing using toluene for 30 minutes, this test piece was wiped clean. Next, the test piece was immersed for 1 minute in a solution prepared by adding a predetermined amount of the steel plate discoloration inhibitor shown in Table 1 to Atsugi city water at 20°C, and brought into contact with the solution.
次いで、前記試験片を、８０℃厚木市水に第１表に記載
したアミノ基又はカルボキシル基を含む化合物を所定量
添加したリンス水１００１ｒＬｌを含むビーカーに入れ
る。（なお第１表中、本化合物欄に「−」とあるのは、
薬剤を添加せず、８０℃市水にそのまま浸漬したことを
示す）。この時、水中浸漬部は全体の１／４ トＬ、、
ビーカーに蓋をした状態で１ｏ分間放置した。Next, the test piece is placed in a beaker containing 1001 rLl of rinsing water prepared by adding a predetermined amount of a compound containing an amino group or a carboxyl group listed in Table 1 to 80° C. Atsugi city water. (In Table 1, "-" in the compound column means
(Indicates that the sample was immersed in 80°C city water without adding any chemicals.) At this time, the part immersed in water is 1/4 of the total length.
The beaker was left covered for 10 minutes.
その後、試験片を取り出してメタノールで洗い、冷風乾
燥し、目視観察により変色防止効果を調べた。Thereafter, the test piece was taken out, washed with methanol, dried with cold air, and visually observed to examine its discoloration prevention effect.
結果を第−表に示す。The results are shown in Table 1.
なお、評価基準は次の通りである。The evaluation criteria are as follows.
◎・・・非常に優れる（発錆、変色は全くない）
○・・・優れる（発錆、変色はほとんどない）△・・・
やや劣る（発錆、変色が若干認められる）
×・・・劣る（発錆、変色が顕著である）第 １
表
率Ｉ ＰＥＨＡ：ペンタエチレンへキサミノ＄２ ８
ＨＡ ：シクロヘキフルアミノ＊３ ＭＩＰＡ：モ
ノイソプロパノールアミノ傘４ ＤＥＡ ： ジェ
タノールアミノ第１表より、本発明方法では、鋼材がど
こにあろうと変色防止されていることが明らかである。◎...Excellent (no rust or discoloration at all) ○...Excellent (almost no rust or discoloration)△...
Slightly inferior (slight rusting and discoloration are observed) ×...poor (rusting and discoloration are noticeable) 1st
Coverage ratio I PEHA: Pentaethylene hexamino $2 8
HA: Cyclohexyfluamino*3 MIPA: Monoisopropanol amino umbrella 4 DEA: Jetanol amino From Table 1, it is clear that the method of the present invention prevents discoloration wherever the steel material is located.
本発明は鋼板変色防止剤と、アミノ基又はカルボキシル
基含有化合物とを用いて鋼板を処理するようにしたため
、ライン運転中でも、ライン停止時でも、鋼板の変色防
止を確実に行なうことができる。Since the present invention treats the steel plate using a steel plate discoloration inhibitor and a compound containing an amino group or a carboxyl group, the discoloration of the steel plate can be reliably prevented even when the line is running or when the line is stopped.
特許出願人 栗田工業株式会社Patent applicant Kurita Industries Co., Ltd.
Claims (1)
にアミノ基またはカルボキシル基を持つ化合物を含むリ
ンス水と接触させることを特徴とする鋼板の変色防止方
法。1) A method for preventing discoloration of a steel plate, which comprises bringing the steel plate into contact with a liquid containing a steel plate discoloration inhibitor, and then further contacting the steel plate with rinsing water containing a compound having an amino group or a carboxyl group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6080088A JPH07835B2 (en) | 1988-03-15 | 1988-03-15 | Steel plate discoloration prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6080088A JPH07835B2 (en) | 1988-03-15 | 1988-03-15 | Steel plate discoloration prevention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234583A true JPH01234583A (en) | 1989-09-19 |
| JPH07835B2 JPH07835B2 (en) | 1995-01-11 |
Family
ID=13152760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6080088A Expired - Fee Related JPH07835B2 (en) | 1988-03-15 | 1988-03-15 | Steel plate discoloration prevention method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07835B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697032A1 (en) * | 1992-10-19 | 1994-04-22 | Lorraine Laminage | Process for stripping steel materials |
| WO1995030781A3 (en) * | 1994-05-05 | 1996-03-07 | Sjunnesson Sales Acc | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
| EP0787832A1 (en) * | 1996-02-06 | 1997-08-06 | Abbey (Research & Development) Ltd. | Treatment of ferrous metal surfaces |
| WO1999023281A1 (en) * | 1997-10-30 | 1999-05-14 | Henkel Kommanditgesellschaft Auf Aktien | METAL PROCESSING LIQUID FOR THE NEUTRAL pH RANGE |
| KR19990052237A (en) * | 1997-12-22 | 1999-07-05 | 이구택 | Surface oxidation prevention method of cold rolled steel sheet using dicyclohexylamine nitrite |
| KR20010062873A (en) * | 1999-12-20 | 2001-07-09 | 이구택 | Pickling composition having a good surface whiteness for the steels |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4750386B2 (en) * | 2004-07-15 | 2011-08-17 | スギムラ化学工業株式会社 | Water washing treatment method for pickled steel strip |
-
1988
- 1988-03-15 JP JP6080088A patent/JPH07835B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697032A1 (en) * | 1992-10-19 | 1994-04-22 | Lorraine Laminage | Process for stripping steel materials |
| EP0595686A1 (en) * | 1992-10-19 | 1994-05-04 | Sollac | Process for pickling steel materials |
| WO1995030781A3 (en) * | 1994-05-05 | 1996-03-07 | Sjunnesson Sales Acc | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
| US5609692A (en) * | 1994-05-05 | 1997-03-11 | Chlor Rid International, Inc. | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
| EP0787832A1 (en) * | 1996-02-06 | 1997-08-06 | Abbey (Research & Development) Ltd. | Treatment of ferrous metal surfaces |
| US5916379A (en) * | 1996-02-06 | 1999-06-29 | Abbey Research & Development Ltd. | Treatment of ferrous metal surfaces |
| WO1999023281A1 (en) * | 1997-10-30 | 1999-05-14 | Henkel Kommanditgesellschaft Auf Aktien | METAL PROCESSING LIQUID FOR THE NEUTRAL pH RANGE |
| KR19990052237A (en) * | 1997-12-22 | 1999-07-05 | 이구택 | Surface oxidation prevention method of cold rolled steel sheet using dicyclohexylamine nitrite |
| KR20010062873A (en) * | 1999-12-20 | 2001-07-09 | 이구택 | Pickling composition having a good surface whiteness for the steels |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07835B2 (en) | 1995-01-11 |
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