JP4943432B2 - 耐食性及び溶接性に優れたプレシールド鋼板及びこれの製造方法 - Google Patents
耐食性及び溶接性に優れたプレシールド鋼板及びこれの製造方法Info
- Publication number
- JP4943432B2 JP4943432B2 JP2008523794A JP2008523794A JP4943432B2 JP 4943432 B2 JP4943432 B2 JP 4943432B2 JP 2008523794 A JP2008523794 A JP 2008523794A JP 2008523794 A JP2008523794 A JP 2008523794A JP 4943432 B2 JP4943432 B2 JP 4943432B2
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- weight
- resin
- solution
- corrosion resistance
- resin solution
- 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 - Fee Related
Links
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Images
Classifications
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
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- B82B3/00—Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
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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
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- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
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- C08G59/5053—Amines heterocyclic containing only nitrogen as a heteroatom
- C08G59/508—Amines heterocyclic containing only nitrogen as a heteroatom having three nitrogen atoms in the ring
- C08G59/5086—Triazines; Melamines; Guanamines
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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
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- 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
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- C—CHEMISTRY; METALLURGY
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Description
全体溶液を基準に、数平均分子量が5,000〜15,000の水分散性アクリルまたはエポキシ樹脂から選択された1種以上の樹脂1.0〜15.0重量%、ベントナイトまたはモンモリロナイト系から選択された1種以上のナノクレイ0.05〜5.0重量%、硬化剤としてメラミン樹脂から選択された1種以上の樹脂0.1〜5.0重量%、pHが7.0以上のコロイダルシリカまたは金属シリケート化合物から選択された1種以上のシリケート1.0〜25.0重量%、有機チタネートまたは有機ジルコネート系から選択された1種以上の有機−金属酸化物0.1〜10.0重量%、及び残部の水から成ることを特徴とするプレシールド鋼板用クロムフリー前処理溶液組成物が提供される。
全体溶液を基準に、数平均分子量が150〜500のエポキシ樹脂10.0〜25.0重量%、硬化剤としてメラミン樹脂5.0〜10.0重量%、ヘキサメチレンブロックジイソシアネートウレタン樹脂1.0〜15.0重量%、Ni、Al、Zn、Fe2P、FeP、Ti及びSnで構成されるグループから選択された1種以上の金属粉末40〜60重量%、カルシウムイオン交換非晶質シリコンジオキサイド5.0〜15.0重量%、及び残部の溶剤から成ることを特徴とするプレシールド鋼板用溶接性樹脂溶液が提供される。
金属基材の少なくとも一面に本発明によるクロムフリー前処理溶液を乾燥被膜厚さが0.05〜1.0μmになるよう塗布する段階と、
上記塗布されたクロムフリー前処理溶液を60〜298℃の温度で焼付し冷却してクロムフリー前処理被膜層を形成する段階と、
を含むプレシールド鋼板の製造方法が提供され、これに
上記乾燥されたクロムフリー前処理被膜層上に本発明による溶接性樹脂溶液を乾燥被膜の厚さが2.0〜5.0μmになるよう塗布する段階と、
上記溶接性樹脂溶液が塗布された鋼板を220〜298℃に焼付した後空冷または水冷してプレシールド樹脂被膜層を形成する段階と、
がさらに含まれるプレシールド鋼板の製造方法が提供される。
(a)金属基材と、
(b)上記金属基材の少なくとも一面に本発明によるクロムフリー前処理溶液を塗布して形成されたクロムフリー前処理被膜層と、
を含む耐食性及び溶接性に優れたプレシールド鋼板が提供され、これに
(c)上記クロムフリー前処理被膜層の少なくとも一面に本発明による溶接性樹脂溶液を塗布して形成されたプレシールド樹脂被膜層と、
がさらに含まれる耐食性及び溶接性に優れたプレシールド鋼板が提供される。
本発明のプレシールド鋼板の物性は主に前処理層と樹脂層により大きく影響を受け、鋼板上層部にある樹脂は腐食因子に対する1次的な遮蔽効果と下層前処理層の急激な溶出や損失を防ぐ2次的な遮蔽効果により樹脂被覆鋼板の耐食性を確保する役割をする。鋼板の下層部を構成する前処理層被膜は腐食因子に対する遮蔽効果で鋼板の耐食性を確保し、鋼板との密着力確保及び上部樹脂層との密着力確保効果により耐食性を向上させ加工時樹脂層の脱膜を防ぐ役割をするため、前処理層がこのような要求特性を確保できないと鋼板から意図する耐食性と加工性のような物性が達成されない。
[実施例1−1]
本実施例ではクロムフリー前処理溶液の樹脂含量と硬化剤の含量変化及び水分散性ナノクレイの含量による樹脂溶液の溶液安定性、樹脂コーティング物の物性を評価した。
○:赤錆発生:72〜96時間、白錆発生24〜48時間
□:赤錆発生:48〜72時間、白錆発生12〜24時間
△:赤錆発生:24〜48時間、白錆発生12時間以内
×:赤錆発生:24時間以内
○:連続打点数1,000〜1,200
□:連続打点数800〜1,000
△:連続打点数800以下
×:溶接不可
□:テープ面に面積比対比5%以内の剥離発生
△:テープ面に面積比対比5%以上の剥離発生
×:テープ面に全面剥離発生
分子量が10000のアクリル樹脂10重量%、メラミン樹脂5重量%、ベントナイト系ナノクレイ0.5重量%とpH9.0のコロイダルシリカ、アミノカルボキシレート耐食向上剤、カルボキシ酸エステル分散剤、シランカップリング剤、有機Ti酸化物の含量を表1−2に表した含量でそれぞれ配合して、比較例21〜36及び発明例5〜10の前処理溶液を製造した後、これら添加剤の含量変化による溶液安定性を評価し、上記比較例21〜36及び発明例5〜10の前処理溶液を上記実施例1−1のような方法で鋼板にコーティングした後、耐食性、加工後密着性、樹脂密着性及び溶接性について評価した。比較例21〜36及び発明例5〜10の前処理溶液において残部は水である。
□:テープ面に面積比対比5%以内の剥離発生
△:テープ面に面積比対比5%以上の剥離発生
×:テープ面に全面剥離発生
本実施例では上記実施例1−2の発明例5の組成により製造された溶液を厚さが0.7mmの40〜60g/m2のメッキ付着量で亜鉛合金メッキまたは電気メッキされた鋼板の素地鋼板に下記の表1−3に表した焼付温度及び乾燥塗膜の厚さでコーティングして、比較材(1〜5)及び発明材(1〜6)のプレシールド鋼板を製造した。その後、前述の実施例と同様の方法で耐食性、樹脂密着性、加工後密着性、及び溶接性を評価した。
[実施例2−1]
本実施例では溶接性樹脂溶液の樹脂の含量、金属粉末含量と硬化剤の含量による樹脂溶液の溶液安定性、樹脂コーティング物の物性を評価した。
○:赤錆発生:1000時間以上、白錆発生600〜800時間
□:赤錆発生:800〜1000時間、白錆発生400〜600時間
△:赤錆発生:600〜800時間、白錆発生400時間以内
×:赤錆発生:600時間以内
□:テープ面に面積比対比5%以内の剥離発生
△:テープ面に面積比対比5%以上の剥離発生
×:テープ面に全面剥離発生
○:連続打点数1,000〜1,200
□:連続打点数800〜1,000
△:連続打点数800以下
×:溶接不可
分子量500のエポキシ樹脂10重量%、メチル化メラミン樹脂6重量%、ブロックイソシアネートウレタン樹脂2重量%、平均粒子直径が3.0μmのZn粉末40重量%と平均粒子直径が約3.0μmのカルシウムイオン置換非晶質シリコンジオキサイド、ポリシロキサン系分散剤、有機ジルコネート酸化物、分子量が約200のソルビトールポリグリシジルエーテル付着増進剤、シラン化合物及びポリテトラフルオロエチレン変性ポリエチレンワックスの含量を表2−2に表したようにそれぞれ配合して、比較例21〜39及び発明例5〜8の樹脂溶液を製造した後、これら添加剤の含量変化による溶液安定性を評価し、上記比較例21〜39及び発明例5〜8の樹脂溶液を上記実施例2−1のような方法で鋼板にコーティングした後、耐食性、加工性、加工後密着性、樹脂密着性及び溶接性について評価した。残部はキシレン溶剤である。
□:片面摩擦係数が0.15以上0.18未満
△:片面摩擦係数が0.18以上0.20未満
×:片面摩擦係数が0.20以上
□:テープ面に面積比対比5%以内の剥離発生
△:テープ面に面積比対比5%以上の剥離発生
×:テープ面に全面剥離発生
本実施例では上記実施例2−2の発明例5の組成により製造された溶液をクロムフリー層の乾燥被膜の厚さが0.2μm処理され、鋼板の厚さが0.7mmで、40〜60g/m2の付着量で亜鉛合金メッキまたは電気メッキされた鋼板の素地鋼板に上記樹脂溶液を下記の表2−3に表した焼付温度及び乾燥塗膜の厚さで樹脂コーティングした後、比較材(1〜10)及び発明材(1〜4)を用いて耐食性、樹脂密着性、加工後密着性、及び溶接性を評価した。
Claims (13)
- 全体溶液を基準に、数平均分子量が150〜500のエポキシ樹脂10.0〜25.0重量%、硬化剤としてメラミン樹脂5.0〜10.0重量%、ヘキサメチレンブロックジイソシアネートウレタン樹脂1.0〜15.0重量%、Ni、Al、Zn、Fe2P、FeP、Ti及びSnで構成されるグループから選択した1種以上の金属粉末40〜60重量%、カルシウムイオン交換非晶質シリコンジオキサイド5.0〜15.0重量%及び残部の溶剤から成ることを特徴とするプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液は、有機チタネート、または有機ジルコネート系から選択した1種以上の有機金属酸化物0.1〜10.0重量%をさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液は、分子量が150〜250のソルビトールポリグリシジルエーテル系付着増進剤1.0〜5.0重量%をさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液は、Al−Zr系化合物、または3−グリシドキシプロピルトリメトキシシランから選択した1種以上のカップリング剤3.0重量%以下をさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液にポリエチレン、ポリテトラフルオロエチレン、カルナバ系ワックス及びPE−PTFEが混合、または変性されたワックスで構成されるグループから選択した1種以上のワックス1.0〜3.0重量%をさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液は、p−トルエンスルホン酸、またはジブチルスズジラウレートの中から選択した1種以上の硬化促進剤0.1〜3.0重量%をさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- 前記溶接性樹脂溶液は、ポリシロキサン系、またはカルボキシ酸系から選択された1種以上の分散剤を3.0重量%以下でさらに含むことを特徴とする請求項1に記載のプレシールド鋼板用溶接性樹脂溶液。
- (a)金属基材;及び
(b)前記金属基材の少なくとも一面に、請求項1乃至7のいずれか1項の溶接性樹脂溶液を塗布して形成されたプレシールド樹脂被膜層:
を含むことを特徴とする耐食性及び溶接性に優れたプレシールド鋼板。 - 前記金属基材と前記プレシールド樹脂被膜層との間にクロムフリー前処理溶液を塗布して形成されたクロムフリー前処理被膜層をさらに含むことを特徴とする請求項8に記載の耐食性及び溶接性に優れたプレシールド鋼板。
- 前記クロムフリー前処理溶液は全体溶液を基準に、数平均分子量が5,000〜15,000の水分散性、アクリルまたはエポキシ樹脂から選択した1種以上の樹脂1.0〜15.0重量%、ベントナイト、またはモンモリロナイト系から選択した1種以上のナノクレイ0.05〜5.0重量%、硬化剤としてメラミン樹脂0.1〜5.0重量%、pHが7.0以上のコロイダルシリカ、または金属シリケート化合物から選択した1種以上のシリケート1.0〜25.0重量%、有機チタネート、または有機ジルコネート系から選択した1種以上の有機−金属酸化物0.1〜10.0重量%、及び残部の水から成ることを特徴とする請求項9に記載の耐食性及び溶接性に優れたプレシールド鋼板。
- 前記クロムフリー前処理溶液は、ポリシロキサン系、またはカルボキシ酸系から選択した1種以上の分散剤を3.0重量%以下でさらに含むことを特徴とする請求項10に記載の耐食性及び溶接性に優れたプレシールド鋼板。
- 前記クロムフリー前処理溶液は、Al−Zr系化合物、または3−グリシドキシプロピルトリメトキシシランから選択した1種以上のカップリング剤3.0重量%以下をさらに含むことを特徴とする請求項10に記載の耐食性及び溶接性に優れたプレシールド鋼板。
- 前記クロムフリー前処理溶液は、アミノカルボキシレート系耐食向上剤5.0重量%以下をさらに含むことを特徴とする請求項10に記載の耐食性及び溶接性に優れたプレシールド鋼板。
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KR10-2005-0067393 | 2005-07-25 | ||
KR20050067393 | 2005-07-25 | ||
PCT/KR2006/002930 WO2007013761A1 (en) | 2005-07-25 | 2006-07-25 | Pre-sealed steel sheet with improved anti- corrosion and weldability and preparing method thereof |
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US (1) | US20080199723A1 (ja) |
EP (2) | EP1907492B1 (ja) |
JP (1) | JP4943432B2 (ja) |
KR (2) | KR100979056B1 (ja) |
CN (1) | CN101258206B (ja) |
CA (1) | CA2616357C (ja) |
IN (1) | IN2008DE01494A (ja) |
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EP1907492B1 (en) | 2014-01-08 |
JP2009503253A (ja) | 2009-01-29 |
CN101258206B (zh) | 2012-04-04 |
CA2616357C (en) | 2010-11-09 |
EP1907492A4 (en) | 2010-06-02 |
US20080199723A1 (en) | 2008-08-21 |
MX2008001146A (en) | 2008-05-15 |
EP1907492A1 (en) | 2008-04-09 |
CA2616357A1 (en) | 2007-02-01 |
KR100957941B1 (ko) | 2010-05-13 |
WO2007013761A1 (en) | 2007-02-01 |
KR20100013331A (ko) | 2010-02-09 |
IN2008DE01494A (ja) | 2008-06-20 |
EP2636711A1 (en) | 2013-09-11 |
KR100979056B1 (ko) | 2010-08-30 |
KR20080033999A (ko) | 2008-04-17 |
WO2007013761A8 (en) | 2008-02-21 |
CN101258206A (zh) | 2008-09-03 |
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