JPS6334793B2 - - Google Patents
Info
- Publication number
- JPS6334793B2 JPS6334793B2 JP12668381A JP12668381A JPS6334793B2 JP S6334793 B2 JPS6334793 B2 JP S6334793B2 JP 12668381 A JP12668381 A JP 12668381A JP 12668381 A JP12668381 A JP 12668381A JP S6334793 B2 JPS6334793 B2 JP S6334793B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminized steel
- treatment
- blister
- steel sheet
- painted
- 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
Links
- 229910000680 Aluminized steel Inorganic materials 0.000 claims description 20
- 238000011282 treatment Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- JTXUAHIMULPXKY-UHFFFAOYSA-N 3-trihydroxysilylpropan-1-amine Chemical group NCCC[Si](O)(O)O JTXUAHIMULPXKY-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 description 18
- 238000012360 testing method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000010953 base metal Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 238000010422 painting Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 229920000298 Cellophane Polymers 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009778 extrusion testing Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000002687 nonaqueous vehicle Substances 0.000 description 1
- 238000011369 optimal treatment Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000037303 wrinkles Effects 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
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Description
本発明はアルミメツキ鋼板を下地金属板とする
焼付塗装鋼板の耐ブリスター性を改良した製造方
法に関するものである。
一般に亜鉛メツキ鋼板やアルミメツキ鋼板を下
地金属とする塗装鋼板においては、亜鉛やアルミ
ニウムは下地の鉄に比較して卑の電位を示すため
所謂犠牲防食効果により亜鉛やアルミニウムが選
択的に溶出し、鋼素地を保護する。該亜鉛若しく
はアルミニウムをメツキした鋼板を下地金属と
し、その上に塗装を施した塗装鋼板の場合は、亜
鉛やアルミニウムの溶出に伴つて発生する水素ガ
スや外界から塗膜を通して浸透した水蒸気により
塗膜と下地金属面との間に内部圧を生じ塗膜を押
上げ、所謂フクレ（ブリスター）が発生する。
この様なフクレは当然ながら塗膜と下地金属面
の間に空間が生じ、その部分に水分，或いは各種
イオンが浸入し腐食を促進させる。また塗膜欠陥
部や端面からの水分などの侵入についても同様
に、その周辺部よりフクレを生じ腐食を促進させ
る。
この様な傾向は亜鉛の方が大きく、耐ブリスタ
ー性としてはアルミニウムの方が良好な筈である
が、通常のアルミメツキ鋼板を下地金属とした塗
装鋼板は表面層にシリコンなどの不純物が偏析す
るため、或いはメツキ表面のメツキ欠陥などの原
因から最適な処理方法が未だ提案されておらず、
そのため塗膜の密着性も充分でなく、延いてはブ
リスター性も良好とは言えない。
アルミメツキ鋼板の塗装前処理としては陽極酸
化、クロメート処理，リン酸皮膜処理などによる
方法が提案されて来ている。しかしクロメート処
理はクロムの排水処理などの公害問題があるし、
リン酸皮膜処理についてはスラツジ処理の問題が
ある。
そこで本発明者等は水系で長期安定性に優れた
アミノシランをアルミメツキ鋼板の塗装前処理を
行なうことによりアルミメツキ鋼板と塗料との密
着性，化成処理皮膜としての耐水性に優れ、しか
も塗料との界面で塗料の硬化剤としても働き公害
防止的観点からも好適な方法を見出すに至つた。
本発明は下地金属がアルミメツキ鋼板である塗
装焼付けされて送られた塗装鋼板の耐ブリスター
性の向上について提案するものである。
即ち、本発明は
(1) 下地金属がアルミメツキ鋼板に限定されるこ
と、
(2) 水性のアミノシランで処理すること、
(3) アミノシラン水溶液のPHを８〜10の範囲の弱
アルカリ性に調整して用いること、
(4) 塗装前に加熱することによつてシランの皮膜
を形成させること、
(5) その上面に熱硬化性塗料を塗装・焼付けする
こと、
などを主構成要件とする耐ブリスター性に優れた
塗装アルミメツキ鋼板の製造方法に係るものであ
る。
次に之等の要件について詳細に説明する。
先ず本発明に使用するアルミメツキ鋼板は溶融
メツキ，蒸着メツキ，その他任意の方法で製造さ
れたものでよい。使用される塗料としては金属と
の密着性，耐食性などの観点から主にエポキシ／
硬化剤系の様に熱硬化性塗料が用いられる。
本発明では塗料系としてビスフエノールＡ型の
エポキシやエポキシ―ポリエステル，エポキシ―
アクリル，エポキシ―ウレタンなどの変性エポキ
シ系やポリエステル系或いは変性ポリエステル系
と硬化剤との組合わせ系の塗料がシランカツプリ
ング剤との反応性の観点から好ましい。
シランカツプリング剤の作用機構はよく知られ
ているが、シランカツプリング剤をRSiX3で表わ
すと無機物表面の水分などで加水分解されて
RSiX3＋3H2O→RSi（OH）3＋3HX
となり無機物表面に吸着されてシロキサン結合の
皮膜を形成し緻密な耐水性皮膜となる。
また有機官能基Ｒは塗料のポリマーと反応し、
密着性の向上に寄与する。
一方、塗装前処理としては無公害の水系処理を
採用出来れば公害処理や防曝設備などが不要であ
る。
しかるに従来、シランカツプリング剤の水系処
理は余り効果が無かつたが、本発明では元来水系
のアミノシランを用い、その好適条件を探求した
点に意義がある。即ち、顔料に非水性ベヒクルと
シランカツプリング剤とを加えてアンカー材とす
る従来知られている方法ではなく、本発明では塗
膜と下地金属との間に水性アミノシランを用いて
形成した膜状物を介在させることを特徴としてお
り、両者の技術は根本的に相違している。
故にアミノシランとしては下記構造のアミノプ
ロピル―トリハイドロキシシランが適している。
NH2―CH2―CH2―CH2Si（OH）3
このことは水溶液中で水系結合により安定に存
在し、水に如何なる割合でも安定に混合出来、貯
蔵においても危険物として取扱う必要がなく任意
に水で希釈したものも保存可能である。また塗料
に対しては前記した如く活性水素を有するアミノ
基が塗料の硬化剤として作用するため塗膜と下地
金属との間に強固な密着が得られる。
本発明に使用する水性アミノシランの１種であ
る水溶性のアミノプロピルトリハイドロキシシラ
ンの濃度はアルミメツキ鋼板上に塗布・乾燥後の
皮膜量と関連し、多量に塗布されると、そのアミ
ノシランの架橋物自体破壊されたり効果が飽和し
たりするので処理水溶液の濃度は0.1〜10重量％
の範囲内であり且つ処理時間は10〜20秒間の範囲
でコントロールする必要がある。
また処理液のPHは鋼板面を軽度にアルカリ洗浄
するため８〜10の範囲にする必要がある。
上記した様にアミノシランはアルミメツキ鋼板
の表面でハイドロキシ基が吸着し、加熱によつて
緻密なシロキサン結合の耐水皮膜を形成するこ
と、本発明では上面に塗装する場合には水分が残
存していると焼付時にワキが発生すること、など
の理由でアミノシランの水溶液を塗布後、90〜
150℃で乾燥する必要がある。
本発明は処理工程が簡単でしかも公害処理の必
要のないアルミメツキ鋼板を下地とする塗装金属
板の製造方法であり、耐ブリスター性は従来のク
ロメート処理に比較して改良され、延いては耐食
性の向上が期待出来るので、工業的価値が高いも
のと考える。
次に本発明を実施例によつて具体的に説明する
が、本発明はその要旨を越えない限り以下の実施
例に制約されるものではない。
実施例 １
アルミメツキの厚みが夫々片面８，20，30μの
アルミメツキ鋼板類をアルカリ脱脂し、アミノプ
ロピルトリハイドロキシシランの１重量％（PH
8.5），５重量％（PH9.1），10重量％（PH10.0）の
夫々水溶液で10秒間浸漬後、ローラーで絞つた。
この処理板を100℃，60秒間加熱処理した。
次いで、上記処理を施したアルミメツキ鋼板に
エポキシ系塗料をプライマーとして5μ，ポリエ
ステル系塗料を15μ，2coat―2bakeして塗装鋼板
を作成し、塗膜の密着性，耐食性，耐湿性などの
テストを行なつた。
なお、塗膜の密着性は表に示す様な３水準の条
件の下で行ない、耐食性はJIS Z2371の塩水噴霧
試験に準拠し、耐湿性はJIS K2246の湿潤試験に
準拠し、夫々次に示す様な試験項目及び試験方法
に基づいて評価した。評価基準は表の欄外に示し
た。
ゴバン目エリクセン試験：
JIS Ｋ 5400 6.15に準拠し、塗装試験片
に対し１mm平方のマス目を鋼素地に達するよ
うにカツターで切り込み、JIS B7729に規定
するエリクセン試験機で押出し、その部分に
セロハンテープを貼り付け急速に剥がし、塗
装面の異常の程度を観察した。
衝撃変形試験（デユポン衝撃変形試験）：
JIS G3312 8.5に準拠し、直径12.7mm
（１／２インチ）、重さ１Kgの重錘を50cmの高
さから落下させ、セロハンテープを貼り付け
急速に剥がし、塗装面の異常の程度を観察し
た。
180度折り曲げ試験：
JIS G3312 8.3に準拠し、塗装試験片を
180度折り曲げ、その内側に同じ厚さの板を
所定枚数挟んで締め付け、折り曲げ部にセロ
ハンテープを貼り付け急速に剥がし、塗装面
の異常の程度を観察した。
エリクセン押出試験：
JIS K6744 8.2に準拠し、JIS B7729に規
定するエリクセン押出機により塗装試験片を
６mm押出し、セロハンテープを貼り付け急速
に剥がし、塗装面の異常の程度を観察した。
表のExp1〜３，10〜12，19〜21が夫々実施例
１であり、Exp9，18，27は夫々従来のクロメー
ト処理材である。
The present invention relates to a manufacturing method for improving the blister resistance of a baked-coated steel plate using an aluminized steel plate as a base metal plate. In general, in painted steel sheets that use galvanized steel sheets or aluminized steel sheets as the base metal, zinc and aluminum exhibit a base potential compared to the underlying iron, so zinc and aluminum are selectively eluted due to the so-called sacrificial corrosion protection effect, and the steel Protect the substrate. In the case of a coated steel plate, in which a steel plate plated with zinc or aluminum is used as the base metal and a coating is applied on top of the base metal, the coating film may be damaged by hydrogen gas generated as the zinc or aluminum elutes or water vapor that permeates through the coating film from the outside world. Internal pressure is generated between the paint and the underlying metal surface, pushing up the paint film and causing so-called blisters. Naturally, such blisters create a space between the paint film and the underlying metal surface, and moisture or various ions enter this space, promoting corrosion. Similarly, when moisture enters from defective parts of the coating film or from the end faces, blisters occur from the surrounding areas and corrosion is accelerated. This tendency is greater for zinc, and aluminum should have better blister resistance, but since impurities such as silicon segregate in the surface layer of painted steel sheets that are made of ordinary aluminized steel sheets as the base metal. , or due to plating defects on the plating surface, an optimal treatment method has not yet been proposed.
Therefore, the adhesion of the coating film is not sufficient, and furthermore, the blister property cannot be said to be good. As pre-painting treatments for aluminized steel sheets, methods such as anodic oxidation, chromate treatment, and phosphoric acid film treatment have been proposed. However, chromate treatment has pollution problems such as chromium wastewater treatment,
Regarding phosphoric acid film treatment, there is a problem with sludge treatment. Therefore, the present inventors applied aminosilane, which is water-based and has excellent long-term stability, to a pre-painting treatment of aluminized steel sheets, thereby improving the adhesion between the aluminized steel sheets and the paint, the water resistance as a chemical conversion coating, and the interface with the paint. The researchers discovered a method that works well as a curing agent for paints and is also suitable from the perspective of preventing pollution. The present invention proposes an improvement in the blister resistance of a coated steel plate whose base metal is an aluminized steel plate and which is sent after being painted and baked. That is, the present invention provides (1) that the base metal is limited to an aluminized steel plate, (2) that it is treated with aqueous aminosilane, and (3) that the pH of the aminosilane aqueous solution is adjusted to be slightly alkaline in the range of 8 to 10. (4) forming a silane film by heating before painting, (5) painting and baking a thermosetting paint on the top surface, etc. The present invention relates to a method for producing a coated aluminized steel sheet with excellent properties. Next, these requirements will be explained in detail. First, the aluminized steel sheet used in the present invention may be manufactured by hot-dip plating, vapor deposition plating, or any other method. The paints used are mainly epoxy/
Thermosetting paints are used like hardener systems. In the present invention, the coating system includes bisphenol A type epoxy, epoxy-polyester, and epoxy-polyester.
Paints based on modified epoxy or polyester such as acrylic or epoxy-urethane, or a combination of a modified polyester and a curing agent are preferred from the viewpoint of reactivity with the silane coupling agent. The mechanism of action of the silane coupling agent is well known, but when the silane coupling agent is expressed as RSiX 3 , it is hydrolyzed by moisture on the surface of the inorganic material, RSiX 3 +3H 2 O→RSi(OH) 3 +3HX, and the surface of the inorganic material becomes It is adsorbed to form a film of siloxane bonds, resulting in a dense water-resistant film. In addition, the organic functional group R reacts with the polymer of the paint,
Contributes to improved adhesion. On the other hand, if a non-polluting water-based treatment can be used as a pre-painting treatment, no pollution treatment or anti-aircraft equipment will be necessary. However, conventionally, water-based treatment of silane coupling agents has not been very effective, but the present invention is significant in that it uses aminosilane, which is originally water-based, and explores its preferred conditions. That is, instead of the conventionally known method of adding a non-aqueous vehicle and a silane coupling agent to a pigment to form an anchor material, the present invention uses a film-like method formed using an aqueous aminosilane between the coating film and the underlying metal. The two techniques are fundamentally different, as they are characterized by the intervention of objects. Therefore, aminopropyl-trihydroxysilane having the following structure is suitable as the aminosilane. NH 2 ―CH 2 ―CH 2 ―CH 2 Si(OH) 3 This means that it exists stably in an aqueous solution due to aqueous bonding, can be stably mixed with water at any ratio, and does not need to be treated as a dangerous substance during storage. It can also be stored optionally diluted with water. In addition, for paints, as mentioned above, the amino group having active hydrogen acts as a curing agent for the paint, so that strong adhesion can be obtained between the paint film and the base metal. The concentration of water-soluble aminopropyltrihydroxysilane, which is a type of water-based aminosilane used in the present invention, is related to the amount of film after coating and drying on an aluminized steel plate. The concentration of the treated aqueous solution is 0.1 to 10% by weight as it may be destroyed or the effect may become saturated.
It is necessary to control the processing time within the range of 10 to 20 seconds. Further, the pH of the treatment liquid needs to be in the range of 8 to 10 in order to lightly alkaline clean the steel plate surface. As mentioned above, the hydroxyl group of aminosilane is adsorbed on the surface of the aluminized steel plate, and when heated, it forms a dense water-resistant film of siloxane bonds. After applying an aqueous solution of aminosilane for reasons such as the appearance of wrinkles during baking,
Must be dried at 150°C. The present invention is a method for manufacturing painted metal sheets using aluminized steel sheets as a base material, which has a simple treatment process and does not require pollution treatment.It has improved blister resistance compared to conventional chromate treatment, and has improved corrosion resistance. Since improvements can be expected, it is considered to have high industrial value. EXAMPLES Next, the present invention will be specifically explained with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof. Example 1 Aluminized steel sheets with aluminized thicknesses of 8, 20, and 30μ on one side, respectively, were degreased with alkali and treated with 1% by weight of aminopropyltrihydroxysilane (PH
8.5), 5% by weight (PH9.1), and 10% by weight (PH10.0) for 10 seconds, and then squeezed with a roller.
This treated plate was heat treated at 100°C for 60 seconds. Next, a coated steel plate was prepared by applying 5μ of epoxy paint as a primer and 15μ of polyester paint as a primer to the aluminized steel sheet that had undergone the above treatment, and 2coat-2bake to create a coated steel sheet, and tests were conducted on the adhesion, corrosion resistance, moisture resistance, etc. of the paint film. Summer. The adhesion of the paint film was tested under three levels of conditions as shown in the table. Corrosion resistance was based on the salt spray test of JIS Z2371, and moisture resistance was based on the wet test of JIS K2246. Evaluations were made based on various test items and test methods. The evaluation criteria are shown outside the table. Goban Erichsen test: In accordance with JIS K 5400 6.15, a 1 mm square square was cut into the painted test piece using a cutter to reach the steel substrate, extruded using an Erichsen testing machine specified in JIS B7729, and cellophane tape was applied to the area. was applied and rapidly peeled off, and the degree of abnormality on the painted surface was observed. Impact deformation test (DuPont impact deformation test): Compliant with JIS G3312 8.5, diameter 12.7mm
(1/2 inch), a weight weighing 1 kg was dropped from a height of 50 cm, cellophane tape was applied and rapidly peeled off, and the degree of abnormality on the painted surface was observed. 180 degree bending test: Based on JIS G3312 8.3, painted test piece
It was bent 180 degrees, a predetermined number of boards of the same thickness were sandwiched inside and tightened, and cellophane tape was pasted on the bend and rapidly peeled off to observe the degree of abnormality on the painted surface. Erichsen extrusion test: In accordance with JIS K6744 8.2, a painted test piece was extruded by 6 mm using an Erichsen extruder specified in JIS B7729, cellophane tape was applied and rapidly peeled off, and the degree of abnormality on the painted surface was observed. Exps 1 to 3, 10 to 12, and 19 to 21 in the table are respectively Example 1, and Exps 9, 18, and 27 are conventional chromate treated materials, respectively.
【表】【table】
【表】【table】
【表】
表から明らかな如く、塩水噴霧試験や湿潤試験
におけるブリスターの進行程度（ふくれ進行程
度）、即ち各々のアルミめつき付着厚さにおける
端面及びクロスカツト部からのふくれ又は錆の進
行の先端までの距離（mm）が比較例（No.９，18，
27，）よりもアミノシランで処理した本発明の実
施例（No.１〜３，10〜12，19〜21）の方がいずれ
も小さく（ふくれ進行程度が遅い）、耐ブリスタ
ー性に優れていることが判る。また、処理濃度が
１〜10重量％では何れも比較例より良好で、本発
明の範囲内では差は無い。
なお、加熱密着性においても向上が認められ
た。
実施例 ２
実施例１と同様にアルカリ脱脂したアルミメツ
キ鋼板をアミノプロピルトリハイドロキシシラン
の１重量％水溶液で10秒間浸漬し、ローラー絞り
した後、加熱条件を種々変えて検討した。
即ち、100℃で10秒と30秒；150℃で10秒，30
秒，60秒夫々加熱処理した。
Exp4〜８，13〜17，22〜26が本発明の実施例
２であり、Exp9，18，27が同様に比較例である。
実施例１と同様に耐ブリスター性は従来材より
優れているが、本発明の範囲では加熱処理理が充
分な程、緻密な層が形成されるため耐ブリスター
性は向上していることが判る。[Table] As is clear from the table, the degree of blister progression (degree of blister progression) in the salt spray test and wet test, that is, from the end face and cross cut part to the tip of the blister or rust progression at each aluminum plating thickness. The distance (mm) is the comparative example (No. 9, 18,
The examples of the present invention (Nos. 1 to 3, 10 to 12, and 19 to 21) treated with aminosilane are all smaller (the blistering progress is slower) than the 27), and have excellent blister resistance. I understand that. In addition, when the treatment concentration is 1 to 10% by weight, the results are better than the comparative example, and there is no difference within the scope of the present invention. Note that an improvement was also observed in heat adhesion. Example 2 An aluminized steel plate that had been alkaline-degreased in the same manner as in Example 1 was immersed in a 1% by weight aqueous solution of aminopropyltrihydroxysilane for 10 seconds, and after squeezing with a roller, various heating conditions were examined. i.e. 10 seconds and 30 seconds at 100℃; 10 seconds and 30 seconds at 150℃
Heat treatment was performed for 2 seconds and 60 seconds, respectively. Exps 4 to 8, 13 to 17, and 22 to 26 are Example 2 of the present invention, and Exps 9, 18, and 27 are similarly comparative examples. As in Example 1, the blister resistance is superior to the conventional material, but within the scope of the present invention, the more the heat treatment is sufficient, the more dense the layer is formed, so the blister resistance is improved. .
Claims (1)
に調整した水性アミノシランで処理し加熱乾燥
後、焼付塗装を施すことを特徴とする耐ブリスタ
ー性塗装アルミメツキ鋼板の製造方法。 ２ 水性アミノシランがアミノプロピルトリハイ
ドロキシシランであり、その処理濃度が0.1〜10
重量％水溶液である特許請求の範囲第１項記載の
耐ブリスター性塗装アルミメツキ鋼板の製造方
法。 ３ 加熱乾燥条件が90〜150℃、10〜60秒である
特許請求の範囲第１項または第２項記載の耐ブリ
スター性塗装アルミメツキ鋼板の製造方法。[Claims] 1. A degreased aluminized steel plate with a pH of 8 to 10.
A method for producing a blister-resistant coated aluminized steel sheet, which comprises treating the steel sheet with aqueous aminosilane adjusted to the desired temperature, heating and drying, and then applying a baking coating. 2 The aqueous aminosilane is aminopropyltrihydroxysilane, and its treatment concentration is 0.1 to 10.
The method for producing a blister-resistant painted aluminized steel sheet according to claim 1, which is a wt % aqueous solution. 3. The method for producing a blister-resistant painted aluminized steel sheet according to claim 1 or 2, wherein the heating and drying conditions are 90 to 150°C for 10 to 60 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12668381A JPS5830372A (en) | 1981-08-14 | 1981-08-14 | Production of aluminum plated steel plate coated with blister resistant paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12668381A JPS5830372A (en) | 1981-08-14 | 1981-08-14 | Production of aluminum plated steel plate coated with blister resistant paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5830372A JPS5830372A (en) | 1983-02-22 |
| JPS6334793B2 true JPS6334793B2 (en) | 1988-07-12 |
Family
ID=14941268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12668381A Granted JPS5830372A (en) | 1981-08-14 | 1981-08-14 | Production of aluminum plated steel plate coated with blister resistant paint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6827981B2 (en) | 1999-07-19 | 2004-12-07 | The University Of Cincinnati | Silane coatings for metal |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180096120A (en) | 2017-02-20 | 2018-08-29 | 이성우 | Knot support device for line connection of fishing line |
| CN109332133A (en) * | 2018-11-06 | 2019-02-15 | 宁波赛德森减振***有限公司 | A method of improving cast-iron belt pulley damper coating resistance to corrosion |
| CN110280454A (en) * | 2019-06-28 | 2019-09-27 | 中山市广恒合优科技发展有限公司 | High salt fog, high anti-aging silane Pretreatment Technology Before Finishing |
-
1981
- 1981-08-14 JP JP12668381A patent/JPS5830372A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6827981B2 (en) | 1999-07-19 | 2004-12-07 | The University Of Cincinnati | Silane coatings for metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5830372A (en) | 1983-02-22 |
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