JPWO2008059890A1 - 表面処理金属材およびその製造方法 - Google Patents
表面処理金属材およびその製造方法 Download PDFInfo
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- JPWO2008059890A1 JPWO2008059890A1 JP2008544179A JP2008544179A JPWO2008059890A1 JP WO2008059890 A1 JPWO2008059890 A1 JP WO2008059890A1 JP 2008544179 A JP2008544179 A JP 2008544179A JP 2008544179 A JP2008544179 A JP 2008544179A JP WO2008059890 A1 JPWO2008059890 A1 JP WO2008059890A1
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- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- CMZUMMUJMWNLFH-UHFFFAOYSA-N sodium metavanadate Chemical compound [Na+].[O-][V](=O)=O CMZUMMUJMWNLFH-UHFFFAOYSA-N 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- YJVLWFXZVBOFRZ-UHFFFAOYSA-N titanium zinc Chemical compound [Ti].[Zn] YJVLWFXZVBOFRZ-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- JBIQAPKSNFTACH-UHFFFAOYSA-K vanadium oxytrichloride Chemical compound Cl[V](Cl)(Cl)=O JBIQAPKSNFTACH-UHFFFAOYSA-K 0.000 description 1
- HQYCOEXWFMFWLR-UHFFFAOYSA-K vanadium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[V+3] HQYCOEXWFMFWLR-UHFFFAOYSA-K 0.000 description 1
- UUUGYDOQQLOJQA-UHFFFAOYSA-L vanadyl sulfate Chemical compound [V+2]=O.[O-]S([O-])(=O)=O UUUGYDOQQLOJQA-UHFFFAOYSA-L 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- 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
- C23C22/40—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 molybdates, tungstates or vanadates
- C23C22/44—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 molybdates, tungstates or vanadates containing also fluorides or complex fluorides
-
- 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
-
- 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
- C23C22/40—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 molybdates, tungstates or vanadates
- C23C22/42—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 molybdates, tungstates or vanadates containing also phosphates
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
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- 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.]
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Abstract
Description
本出願は、特願2006−309614号を基礎出願とし、その内容を取り込む。
一方、近年では、クロメート処理皮膜が有害な6価クロムを多量に含んでいることを考慮して、環境に配慮すべく、クロメート皮膜の代替として使用できるノンクロム系の表面処理技術の開発が行われている。このようなノンクロム系の表面処理技術としては、例えば、無機成分を用いた処理を施す方法、リン酸塩処理を施す方法、シランカップリング剤単体による処理を施す方法、有機樹脂皮膜処理を施す方法、などが知られており、実用化されている。
(1)前記有機ケイ素化合物(W)と前記フルオロ化合物(X)との固形分質量比〔(X)/(W)〕が、0.02≦〔(X)/(W)〕≦0.07であり、
(2)前記有機ケイ素化合物(W)と前記リン酸(Y)との固形分質量比〔(Y)/(W)〕が、0.03≦〔(Y)/(W)〕≦0.12であり、
(3)前記有機ケイ素化合物(W)と前記バナジウム化合物(Z)との固形分質量比〔(Z)/(W)〕が、0.05≦〔(Z)/(W)〕≦0.17であり、
(4)前記フルオロ化合物(X)と前記バナジウム化合物(Z)との固形分質量比〔(Z)/(X)〕が、1.3≦〔(Z)/(X)〕≦6.0であり、
(5)前記潤滑剤(J)と、前記有機ケイ素化合物(W)及び前記フルオロ化合物(X)及び前記リン酸(Y)及び前記バナジウム化合物(Z)との固形分質量比〔(J)/(W+X+Y+Z)〕が、0.02≦〔(J)/(W+X+Y+Z)〕≦0.12である。
前記金属材が、亜鉛系めっき鋼板であってもよい。
(1)前記水系金属表面処理剤が、分子内に式−SiR1R2R3(式中のR1、R2及びR3は、互いに独立に、アルコキシ基又は水酸基を表し、少なくとも1つはアルコキシ基を表す)で表される官能基(a)2個以上と、水酸基(前記官能基(a)に含まれ得るものとは別個のもの)およびアミノ基から選ばれる少なくとも1種の親水性官能基(b)1個以上とを有し、平均の分子量が1000〜10000である有機ケイ素化合物(W)と;チタンフッ化水素酸またはジルコニウムフッ化水素酸から選ばれる少なくとも1種のフルオロ化合物(X)と;リン酸(Y)と;バナジウム化合物(Z)と;水系分散型のポリエチレンワックス、ポリプロピレンワックスおよびポリテトラフルオロエチレンからなる群より選ばれる少なくとも1種であって、数平均粒子径が0.01μm〜1.0μmで軟化温度が100℃以上である潤滑剤(J)と;を含有し、
(2)前記有機ケイ素化合物(W)が、分子中にアミノ基を1つ含有するシランカップリング剤(A)と、分子中にグリシジル基を1つ含有するシランカップリング剤(B)とを、固形分質量比〔(A)/(B)〕にして0.5〜1.7の割合で配合され、
(3)前記有機ケイ素化合物(W)と前記フルオロ化合物(X)との固形分質量比を〔(X)/(W)〕としたとき、0.02≦〔(X)/(W)〕≦0.07であり、
(4)前記有機ケイ素化合物(W)と前記リン酸(Y)との固形分質量比を〔(Y)/(W)〕としたとき、0.03≦〔(Y)/(W)〕≦0.12であり、
(5)前記有機ケイ素化合物(W)と前記バナジウム化合物(Z)との固形分質量比を〔(Z)/(W)〕としたとき、0.05≦〔(Z)/(W)〕≦0.17であり、
(6)前記フルオロ化合物(X)と前記バナジウム化合物(Z)との固形分質量比を〔(Z)/(X)〕としたとき、1.3≦〔(Z)/(X)〕≦6.0であり、
(7)前記潤滑剤(J)とこの潤滑剤(J)以外の成分との固形分質量比を〔(J)/(W+X+Y+Z)〕としたとき、0.02≦〔(J)/(W+X+Y+Z)〕≦0.12である。
(1)試験素材
金属材としては、下記に示す市販の素材を用いた。
・電気亜鉛めっき鋼板(EG)
:板厚=0.8mm、目付量=20/20(g/m2)
・溶融亜鉛めっき鋼板(GI)
:板厚=0.8mm、目付量=90/90(g/m2)
・電気亜鉛−12%ニッケルめっき鋼板(ZL)
:板厚=0.8mm、目付量=20/20(g/m2)
・合金化溶融亜鉛めっき鋼板(GA)
:板厚=0.8mm、目付量=60/60(g/m2)
・溶融亜鉛−11%アルミニウム−3%マグネシウム−0.2%シリコンめっき鋼板(SD)
:板厚=0.8mm、目付量=60/60(g/m2)
・溶融亜鉛−55%アルミニウムめっき鋼板(GL)
:板厚=0.8mm、目付量=60/60(g/m2)
(2)脱脂処理
上記試験素材を、シリケート系アルカリ脱脂剤のファインクリーナー4336(登録商標:日本パーカライジング(株)製)を用いて、濃度20g/L、温度60℃の条件で2分間スプレー処理し、純水で30秒間水洗したのちに乾燥したものを試験板とした。
(3)表面処理剤の調製
シランカップリング剤(A)とシランカップリング剤(B)を加えて混錬し、有機ケイ素化合物(W)を作製した後、フルオロ化合物(X)、リン酸(Y)、バナジウム化合物(Z)、潤滑剤(J)の順に添加し、常温で充分に攪拌することにより表面処理剤を調製した。
(4)表面処理金属材の作製(表面処理剤の塗布方法)
表面処理剤をロールコーターにて試験板に塗布し、到達板温度を変えながら焼付けを行い、空冷することにより表面処理金属材を作製した。
1.SST平面部試験
JIS−Z−2371による塩水噴霧試験を120時間行い、表面処理金属材の平面部及び加工部の白錆発生状況を観察することにより、表面処理金属材の耐食性を評価した。
<評価基準>
VG=錆発生が全面積の3%未満
G=錆発生が全面積の3%以上10%未満
NG=錆発生が全面積の10%以上30%未満
B=錆発生が全面積の30%以上
エリクセン試験(7mm押し出し)を行った後、JIS−Z−2371による塩水噴霧試験を72時間行い、白錆発生状況を観察することにより、表面処理金属材の加工部の耐食性を評価した。
<評価基準>
VG=錆発生が全面積の10%未満
G=錆発生が全面積の10%以上20%未満
NG=錆発生が全面積の20%以上30%未満
B=錆発生が全面積の30%以上
オーブンにて200℃で2時間加熱後、平面部耐食性JIS−Z−2371による塩水噴霧試験を48時間行い、白錆発生状況を観察することにより、表面処理金属材の耐熱性を評価した。
<評価基準>
VG=錆発生が全面積の3%未満
G=錆発生が全面積の3%以上10%未満
NG=錆発生が全面積の10%以上30%未満
B=錆発生が全面積の30%以上
色差計にて、ワセリン塗布前後のL値増減(ΔL)を測定することにより、表面処理金属材の耐指紋性を評価した。ΔL値は、黒(0)から白(100)までの明るさ度合いをL値とした場合の、試験前後におけるL値の差を示すものであり、具体的には、色彩色差計CR−300(ミノルタ製)を用いて測定することができる。
<評価基準>
VG=ΔLが0.5未満
G=ΔLが0.5以上1.0未満
NG=ΔLが1.0以上2.0未満
B=ΔLが2.0以上
溶剤を染み込ませたガーゼで50回ラビングし、皮膜溶出の有無を蛍光X線分析にてSiを測定することにより、表面処理金属材の耐溶剤性を評価した。
溶剤としては、アセトン、メチルエチルケトン、エタノール、ホワイトガソリンを用いた。
<評価基準>
VG=溶出率が1%未満
G=溶出率が1%以上〜5%未満
NG=溶出率が5%以上〜10%未満
B=溶出率が10%以上
メラミンアルキッド系塗料を焼付け乾燥後の膜厚が25μmとなるようにバーコートで塗布し、120℃で20分焼付けた後、1mmの碁盤目にカットし、密着性の評価を残個数割合(残個数/カット数(=100個))にて行うことにより、表面処理金属材の塗装性を評価した。
<評価基準>
VG=100%
G=95%以上
NG=90%以上、95%未満
B=90%未満
ビード引抜試験機にて、0.3tonの荷重にて引抜きを行い、摺動抵抗値(μ)にて表面処理金属材の摺動性を評価した。
<評価基準>
VG=μが0.30未満
G=μが0.30以上0.35未満
NG=μが0.35以上0.40未満
B=μが0.40以上
ビード引抜試験機にて、0.3tonの荷重にて引抜きを行い、疵付き度合い、すなわち、表面処理剤の加工時の耐疵付性を試験前後のΔL値増減にて評価した。前述のように、ΔL値は、黒(0)から白(100)までの明るさ度合いをL値とした場合の、試験前後におけるL値の差を示すものであり、具体的には、色彩色差計CR−300(ミノルタ製)を用いて測定することができる。
<評価基準>
VG=ΔLが0.5未満
G=ΔLが0.5以上1.0未満
NG=ΔLが1.0以上2.0未満
B=ΔLが2.0以上
高速深絞り試験にて、絞り比2.0で加工し、炭化水素系溶剤にて発生カスを脱脂除去し、試験前後の重量増減にてカス発生量を測定することにより、表面処理剤の耐カス性を評価した。
<評価基準>
VG=重量減が0.05g/m2未満
G=重量減が0.05以上0.1g/m2未満
NG=重量減が0.1以上0.5g/m2未満
B=重量減が0.5g/m2以上
Claims (5)
- 金属材表面に、
分子内に式−SiR1R2R3(式中のR1、R2及びR3は、互いに独立に、アルコキシ基又は水酸基を表し、少なくとも1つはアルコキシ基を表す)で表される官能基(a)2個以上と、水酸基(前記官能基(a)に含まれ得るものとは別個のもの)およびアミノ基から選ばれる少なくとも1種の親水性官能基(b)1個以上とを有してかつ、平均の分子量が1000〜10000である有機ケイ素化合物(W)と;
チタンフッ化水素酸またはジルコニウムフッ化水素酸から選ばれる少なくとも1種のフルオロ化合物(X)と;
リン酸(Y)と;
バナジウム化合物(Z)と;
水系分散型のポリエチレンワックス、ポリプロピレンワックスおよびポリテトラフルオロエチレンからなる群より選ばれる少なくとも1種であって、数平均粒子径が0.01μm〜1.0μmで軟化温度が100℃以上である潤滑剤(J)と;
を含有する複合皮膜を備え、
前記有機ケイ素化合物(W)が、分子中にアミノ基を1つ含有するシランカップリング剤(A)と、分子中にグリシジル基を1つ含有するシランカップリング剤(B)とを、固形分質量比〔(A)/(B)〕で0.5〜1.7の割合で配合して得られるものであり;
前記複合皮膜中の各成分の比率が、下記(1)〜(5)の条件を満たすことを特徴とする表面処理金属材。
(1)前記有機ケイ素化合物(W)と前記フルオロ化合物(X)との固形分質量比〔(X)/(W)〕が、0.02≦〔(X)/(W)〕≦0.07であり、
(2)前記有機ケイ素化合物(W)と前記リン酸(Y)との固形分質量比〔(Y)/(W)〕が、0.03≦〔(Y)/(W)〕≦0.12であり、
(3)前記有機ケイ素化合物(W)と前記バナジウム化合物(Z)との固形分質量比〔(Z)/(W)〕が、0.05≦〔(Z)/(W)〕≦0.17であり、
(4)前記フルオロ化合物(X)と前記バナジウム化合物(Z)との固形分質量比〔(Z)/(X)〕が、1.3≦〔(Z)/(X)〕≦6.0であり、
(5)前記潤滑剤(J)と、前記有機ケイ素化合物(W)及び前記フルオロ化合物(X)及び前記リン酸(Y)及び前記バナジウム化合物(Z)との固形分質量比〔(J)/(W+X+Y+Z)〕が、0.02≦〔(J)/(W+X+Y+Z)〕≦0.12である。 - 請求項1に記載の表面処理金属材であって、
前記複合皮膜に、硫酸コバルト、硝酸コバルトおよび炭酸コバルトからなる群より選ばれる少なくとも1種のコバルト化合物(C)が、前記有機ケイ素化合物(W)とコバルト化合物(C)との固形分質量比〔(C)/(W)〕が0.01〜0.1を満たす割合でさらに含有されている。 - 請求項1に記載の表面処理金属材であって、
乾燥後の前記複合皮膜の皮膜重量が0.05g/m2〜2.0g/m2である。 - 請求項1に記載の表面処理金属材であって、
前記金属材が、亜鉛系めっき鋼板である。 - 下記(1)〜(7)の条件を満たす水系金属表面処理剤を、金属材表面に塗布する工程と;
前記水系金属表面処理剤を、50℃よりも高くかつ250℃未満の到達温度で乾燥させて皮膜重量を0.05〜2.0g/m2にする工程と;
を含むことを特徴とする表面処理金属材の製造方法。
(1)前記水系金属表面処理剤が、分子内に式−SiR1R2R3(式中のR1、R2及びR3は、互いに独立に、アルコキシ基又は水酸基を表し、少なくとも1つはアルコキシ基を表す)で表される官能基(a)2個以上と、水酸基(前記官能基(a)に含まれ得るものとは別個のもの)およびアミノ基から選ばれる少なくとも1種の親水性官能基(b)1個以上とを有し、平均の分子量が1000〜10000である有機ケイ素化合物(W)と;チタンフッ化水素酸またはジルコニウムフッ化水素酸から選ばれる少なくとも1種のフルオロ化合物(X)と;リン酸(Y)と;バナジウム化合物(Z)と;水系分散型のポリエチレンワックス、ポリプロピレンワックスおよびポリテトラフルオロエチレンからなる群より選ばれる少なくとも1種であって、数平均粒子径が0.01μm〜1.0μmで軟化温度が100℃以上である潤滑剤(J)と;を含有し、
(2)前記有機ケイ素化合物(W)が、分子中にアミノ基を1つ含有するシランカップリング剤(A)と、分子中にグリシジル基を1つ含有するシランカップリング剤(B)とを、固形分質量比〔(A)/(B)〕にして0.5〜1.7の割合で配合され、
(3)前記有機ケイ素化合物(W)と前記フルオロ化合物(X)との固形分質量比を〔(X)/(W)〕としたとき、0.02≦〔(X)/(W)〕≦0.07であり、
(4)前記有機ケイ素化合物(W)と前記リン酸(Y)との固形分質量比を〔(Y)/(W)〕としたとき、0.03≦〔(Y)/(W)〕≦0.12であり、
(5)前記有機ケイ素化合物(W)と前記バナジウム化合物(Z)との固形分質量比を〔(Z)/(W)〕としたとき、0.05≦〔(Z)/(W)〕≦0.17であり、
(6)前記フルオロ化合物(X)と前記バナジウム化合物(Z)との固形分質量比を〔(Z)/(X)〕としたとき、1.3≦〔(Z)/(X)〕≦6.0であり、
(7)前記潤滑剤(J)とこの潤滑剤(J)以外の成分との固形分質量比を〔(J)/(W+X+Y+Z)〕としたとき、0.02≦〔(J)/(W+X+Y+Z)〕≦0.12である。
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