JP5363117B2 - 表面処理鋼板 - Google Patents
表面処理鋼板 Download PDFInfo
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- JP5363117B2 JP5363117B2 JP2008550086A JP2008550086A JP5363117B2 JP 5363117 B2 JP5363117 B2 JP 5363117B2 JP 2008550086 A JP2008550086 A JP 2008550086A JP 2008550086 A JP2008550086 A JP 2008550086A JP 5363117 B2 JP5363117 B2 JP 5363117B2
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/095—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyurethanes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0809—Manufacture of polymers containing ionic or ionogenic groups containing cationic or cationogenic groups
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6648—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/086—Organic or non-macromolecular compounds
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2150/00—Compositions for coatings
- C08G2150/90—Compositions for anticorrosive coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
- Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
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Description
本出願は、特願2006−343531号を基礎出願とし、その内容を取り込む。
また、前記表面処理皮膜の上層に、皮膜量が0.2g/m2〜5g/m2である有機無機複合皮膜を更に形成してもよい。
なお、円筒成形加工品の外観評価は、後述のように、円筒成形加工の外観評価(試験前後におけるΔL値)にて行うのが好ましい。ここで言うΔL値とは、ハンター方式に準じた測色法で測定したL値の、試験前後における差を示す。この場合、以下のような基準で評価することができる。
<評価基準>
VG=白錆発生面積が5%未満
G =白錆発生面積が5%以上かつ15%未満
NG=白錆発生面積が15%以上かつ30%未満
B =白錆発生面積が30%以上かつ50%未満
VB=白錆発生面積が50%以上
なお、摺動試験に際しては、市販のバウデン試験機を用いて、摺動面が20mm径の平坦な摺動子に市販のガーゼを取り付け、エタノールを充分に含ませた後、100g/cm2の加圧、100mmの振幅、そして20mm/secのスピードの試験条件において、10回往復摺動を行い、その後の処理板摺動部の外観変化を、以下の基準で評価することができる。
<評価基準>
VG=外観変化なし
G =微かな外観変化あり
NG=明らかな外観変化あり
B =下地の部分露出あり
VB=下地完全露出
(1)カチオン性ウレタン樹脂(C)
(1−1)カチオン性ウレタン樹脂(C−1)
ポリエーテルポリオール(合成成分:テトラメチレングリコール及びエチレングリコール、分子量1500)150質量部、トリメチロールプロパン6質量部、N−メチル−N,N−ジエタノールアミン24質量部、イソホロンジイソシアネート94質量部及びメチルエチルケトン135質量部を反応容器に入れ、70〜75℃に保ちながら1時間反応させてウレタンプレポリマーを生成した。ついで、この反応容器にジメチル硫酸15質量部を入れ、50℃〜60℃で30分間〜60分間反応させて、カチオン性ウレタンプレポリマーを生成した。ついで、この反応容器に水576質量部を入れ、混合物を均一に乳化させた後、メチルエチルケトンを回収して、水溶性のカチオン性ウレタン樹脂(C−1)を得た。
ポリエステルポリオール(合成成分:イソフタル酸、アジピン酸及び1,6−へキサンジオール、エチレングリコール、分子量1700)135質量部、トリメチロールプロパン5質量部、N−メチル−N,N−ジエタノールアミン22質量部、イソホロンジイソシアネート86質量部及びメチルエチルケトン120質量部を反応容器に入れ、70℃〜75℃に保ちながら1時間反応させてウレタンプレポリマーを生成した。該反応容器にジメチル硫酸17質量部を入れ、50℃〜60℃で30分間〜60分間反応させてカチオン性ウレタンプレポリマーを生成した。ついで、この反応容器に水615質量部を入れ、混合物を均一に乳化させた後、メチルエチルケトンを回収して、水溶性のカチオン性ウレタン樹脂(C−2)を得た。
ポリカーボネートポリオール(合成成分:1,6−ヘキサンカーボネートジオール、エチレングリコール、分子量2000)130質量部、トリメチロールプロパン4質量部、N−メチル−N,N−ジエタノールアミン21質量部、イソホロンジイソシアネート75質量部及びメチルエチルケトン115質量部を反応容器に入れ、70℃〜75℃に保ちながら1時間反応をさせてウレタンプレポリマーを生成した。ついで、この反応容器にジメチル硫酸22質量部を入れ、50℃〜60℃で30分間〜60分間反応させてカチオン性ウレタンプレポリマーを生成した。ついで、この反応容器に水633質量部を入れ、混合物を均一に乳化させた後、メチルエチルケトンを回収して、水溶性のカチオン性ポリウレタン樹脂(C−3)を得た。
ポリエステルポリオール(合成成分:イソフタル酸、アジピン酸、1,6−ヘキサンジオール及びエチレングリコール、分子量2000)135質量部、トリメチロールプロパン5質量部、N−メチル−N,N−ジエタノールアミン22質量部、イソホロンジイソシアネート86質量部、γ−アミノプロピルトリエトキシシラン1質量部及びメチルエチルケトン120質量部を反応容器に入れ、70〜75℃に保ちながら1時間反応をさせてウレタンプレポリマーを生成した。ついで、この反応容器にジメチル硫酸17質量部を入れ、50℃〜60℃で30分間〜60分間反応させてカチオン性ウレタンプレポリマーを生成した。ついで、この反応容器に水615質量部を入れ、混合物を均一に乳化させた後、メチルエチルケトンを回収して、シリル変性した水溶性のカチオン性ポリウレタン樹脂(C−4)を得た。
ポリカーボネートポリオール(合成成分:1,3−ジオキソラン−2−オン及び1,6−ヘキサンジオール、分子量1700)150質量部、トリメチロールプロパン6質量部、N−メチル−N,N−ジエタノールアミン24質量部、イソホロンジイソシアネート94質量部、N−(β−アミノエチル)γ−アミノプロピルトリメトキシシラン2質量部及びメチルエチルケトン135質量部を反応容器に入れ、70℃〜75℃に保ちながら1時間反応をさせてウレタンプレポリマーを生成した。ついで、この反応容器にジメチル硫酸15質量部を入れ、50℃〜60℃で30分間〜60分間反応させてカチオン性ウレタンプレポリマーを生成した。ついで、この反応容器に水576質量部を入れ、混合物を均一に乳化させた後、メチルエチルケトンを回収して、シリル変性した水溶性のカチオン性ポリウレタン樹脂(C−5)を得た。
(2−1)カチオン性フェノール系重縮合物(D−1)
還流冷却機を備えた1000mLのフラスコ内に、ビスフェノールA1モル(228g)及び触媒としてp−トルエンスルホン酸0.3gを仕込み、内部温度を100℃まで上げ、ホルムアルデヒド水溶液0.85モル(69g)を1時間かけて添加し、100℃で2時間還流下に反応させた。その後、反応容器を水冷静置し、上層に分離する水層の濁りがなくなってから、デカンテーションして水層を除去し、さらに170℃〜175℃になるまで加熱攪拌して、未反応分及び水分を除去した。
還流冷却機を備えた1000mLのフラスコ内に、フェノール1モル(96g)及び触媒としてp−トルエンスルホン酸0.3gを仕込み、内部温度を100℃まで上げ、ホルムアルデヒド水溶液0.7モル(56.8g)を1時間かけて添加し、100℃で2時間還流下に反応させた。その後、反応容器を水冷静置し、上層に分離する水層の濁りがなくなってから、デカンテーションして水層を除去し、さらに170℃〜175℃になるまで加熱攪拌して、未反応分及び水分を除去した。
還流冷却機を備えた1000mLのフラスコ内に、o−クレゾール1モル(108g)及び触媒としてp−トルエンスルホン酸0.3gを仕込み、内部温度を100℃まで上げ、ホルムアルデヒド水溶液0.85モル(69g)を1時間かけて添加し、100℃で2時間還流下に反応させた。その後、反応容器を水冷静置し、上層に分離する水層の濁りがなくなってから、デカンテーションして水層を除去し、さらに170℃〜175℃になるまで加熱攪拌して、未反応分及び水分を除去した。
(1)脱脂
日本パーカライジング(株)製アルカリ脱脂剤パルクリーンN364S(20g/L建浴、60℃、10秒スプレー、スプレー圧0.5kg/cm2)で被処理金属材料を脱脂した後、スプレー水洗を10秒行った。
(2)塗布及び乾燥
表5〜表10および表11〜表14に記載の表面処理用組成物及び有機無機複合皮膜用処理液は、共に、これをロールコーターで亜鉛系めっき鋼板に塗布し、各条件の鋼板到達板温で加熱乾燥した。皮膜量は、処理液の固形分濃度または塗布条件(ロールの圧化力、回転速度など)により調整した。
鋼板への表面処理用組成物及び有機無機複合皮膜用処理液の塗布乾燥前後の重量差を重量法により求め、塗布面積で除して皮膜付着量とした。
また、表面処理用組成物中のチタン含有量およびマグネシウム含有量は、ICP発光分析法を用いて測定した。
(1)耐エタノール性
実施例1〜90、比較例1〜31において作製した処理板試料について、無加工(平面部)のままで耐エタノール性試験を行った。評価方法は次の通りである。
VG=外観変化なし
G =微かな外観変化あり
NG=明らかな外観変化あり
B =下地の部分露出あり
VB=下地完全露出
実施例1〜90、比較例1〜31において作製した処理板試料について、無加工(平面部)のままで耐食性試験を行った。評価方法は次の通りである。
VG=白錆発生面積が5%未満
G =白錆発生面積が5%以上かつ15%未満
NG=白錆発生面積が15%以上かつ30%未満
B =白錆発生面積が30%以上かつ50%未満
VB=白錆発生面積が50%以上
実施例1〜90、比較例1〜31において作製した処理板試料について、円筒成形加工を実施し、外観評価および耐食性試験を行った。評価方法は次の通りである。
VG=ΔLが2未満
G =ΔLが2以上かつ5未満
NG=ΔLが5以上かつ10未満
B =ΔLが10以上
VG=白錆発生面積が10%未満
G =白錆発生面積が10%以上かつ20%未満
NG=白錆発生面積が20%以上かつ40%未満
B =白錆発生面積が40%以上かつ80%未満
VB=白錆発生面積が80%以上
実施例、比較例において作製した処理板試料について、しごき成形加工を実施し、外観(カス発生)評価および耐食性試験を行った。評価方法は次の通りである。
VG=重量減が0.05g/m2未満、もしくは、ΔLが2未満
G =重量減が0.05以上0.1g/m2未満、もしくは、ΔLが2以上5未満
NG=重量減が0.1以上かつ0.5g/m2未満、もしくは、ΔLが5以上10未満
B =重量減が0.5g/m2以上、もしくは、ΔLが10以上
VG=白錆発生面積が10%未満
G =白錆発生面積が10%以上かつ20%未満
NG=白錆発生面積が20%以上かつ40%未満
B =白錆発生面積が40%以上かつ80%未満
VB=白錆発生面積が80%以上
Claims (3)
- チタンを含有する金属化合物と、
マグネシウムを含有する金属化合物と、
第1級〜第3級アミノ基および第4級アンモニウム塩基から選ばれる少なくとも一種のカチオン性官能基を有するカチオン性ウレタン樹脂と、
フェノール化合物とアルデヒド類との重縮合物であってカチオン性官能基を有するカチオン性フェノール系重縮合物と、
を含有し、前記チタンを含有する金属化合物または前記マグネシウムを含有する金属化合物のいずれか一方又は両方がリン酸との塩である表面処理皮膜を有し;
前記表面処理皮膜中のチタンの含有量が、全固形分に対して1質量%〜4質量%であり;
前記表面処理皮膜中のマグネシウムの含有量が、全固形分に対して0.2質量%〜2質量%であり;
前記表面処理皮膜中の前記カチオン性ウレタン樹脂の含有量が、全固形分に対して20質量%〜35質量%であり、
前記表面処理皮膜中の前記カチオン性フェノール系重縮合物の含有量が、全固形分に対して25質量%〜40質量%であり;
前記カチオン性ウレタン樹脂と前記カチオン性フェノール系重縮合物との質量比率が、33.3:66.7〜49:51である;
ことを特徴とする表面処理鋼板。 - 請求項1に記載の表面処理鋼板であって、
前記表面処理皮膜の皮膜量が、0.1g/m2〜3g/m2である。 - 請求項1または請求項2に記載の表面処理鋼板であって、
前記表面処理皮膜の上層に、皮膜量が0.2g/m2〜5g/m2である有機無機複合皮膜がさらに形成されている。
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