JPH0250192B2 - - Google Patents
Info
- Publication number
- JPH0250192B2 JPH0250192B2 JP57161497A JP16149782A JPH0250192B2 JP H0250192 B2 JPH0250192 B2 JP H0250192B2 JP 57161497 A JP57161497 A JP 57161497A JP 16149782 A JP16149782 A JP 16149782A JP H0250192 B2 JPH0250192 B2 JP H0250192B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- film
- corrosion
- chromate
- steel pipe
- 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 - Lifetime
Links
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 13
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 11
- 229910052745 lead Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 230000005496 eutectics Effects 0.000 claims description 5
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 8
- 229910002058 ternary alloy Inorganic materials 0.000 description 6
- 238000007654 immersion Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 229910020816 Sn Pb Inorganic materials 0.000 description 2
- 229910020922 Sn-Pb Inorganic materials 0.000 description 2
- 229910008783 Sn—Pb Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002356 single layer Substances 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
- C23C22/24—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 hexavalent chromium compounds
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/10—Lead or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Treatment Of Metals (AREA)
- Coating With Molten Metal (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、耐食性被覆鉄鋼材に関し、更に詳し
くは、一般に自動車及びその他各種の機械、設備
等の気体、液体の供給路として数多く配設使用さ
れており、且つ管径約20ｍ／ｍ程度以下の比較的
細径の耐食性被覆鋼管材に関するものである。
従来におけるこのような耐食性被覆鉄鋼材とし
ては、例えば種々の金属材からなる単一層、複合
層もしくわ合金層等からなる鍍膜構造をもつて実
用に供しているが、この被覆鉄鋼材は概して耐食
性と加工性とを同時に且つ充分に満足し得ない傾
向があつた。又容易な作業性によるハンダ付性と
耐食性との問題に関連して、すでに特公昭53−
29134号公報にPb、Sn及びZnの三元合金による
被覆処理方法のものが紹介されているが、鉄鋼材
表面に下層としてZn層を、中間層としてSn−Zn
合金を、上層としてSn−Pb合金層とからなる積
層被覆構造をもつて構成してなるため、これら積
層からなる被膜構造とハンダ付性とに関連して外
層に位置したSn−Pb合金層表面にクロメート被
膜を施すことができず、従つて耐食性を充分に発
揮できず、又、特に、後加工としての製品の曲
げ、挫屈、拡管或は絞り等の成形に際して、しば
しば鉄肌表面とに剥離或いは鍍膜に亀裂を生ぜし
める傾向となり、従つてこのような後加工を必要
とする場合には実用し得ない問題を有するもので
あつた。
本発明の目的は上記した問題を、特に少量とな
したSnの含有量に関連してPb及びZnとのそれぞ
れの含有量と且つ浸漬時間の改善とによつて熔融
鍍膜をこれら三元合金からなる完全な共晶状態と
することによつて、且つこのような共晶状態とす
ることによる熔融鍍膜上へのクロメート被膜の形
成を可能とすることによつて、極めて容易に、ま
た、効果的に解決した耐食性被覆鉄鋼材を提供す
ることで、以下本発明の一実施例として耐食性被
覆鋼管材を図示した図面について詳述すれば、１
は鉄鋼材であり、該鉄鋼材としてその表面１′に
Cuの電鍍膜４を有するか、若くは有しない管径
約20ｍ／ｍ以下の比較的細径の二重巻或いは一重
の管材であつて、その表面１′にPb70％〜80％、
Sn5％〜10％及びZn10％〜25％の重量％の三元合
金からなる完全な共晶状態にある熔融鍍膜２を有
し、該熔融鍍膜の表面２′にクロメート被膜３を
施して形成してなるものである。
なお第４図は第１図実施例に係る耐食性被覆鋼
管材の400倍顕微鏡写真を示し、鋼管の肉厚（白
色部分）の表面にPb（80％）、Sn（10％）及びZn
（10％）の三元合金が完全な共晶状態となつてい
る熔融鍍膜２（膜厚30μ）があり、その上にクロ
メート被膜３が施されている。なお、５は顕微鏡
写真をとるために資料を埋設した樹脂である。
以上の通り本発明に係る鉄鋼材によれば、特に
少量となしたSnの含有量に関連してPb及びZnと
からなる完全な共晶状態にある三元合金による熔
融鍍膜２と該熔融鍍膜上での完全なクロメート被
膜３構造とによつて、著しく耐食性を向上するこ
とができるとともに、表面１′との結着力が強固
となるため後加工時に製品としての曲げ、挫屈、
拡管或いは絞り等の成形に伴う剥離或いは鍍膜の
亀裂発生の憂いがなく、従つて加工性をも増大す
ることができるものである。
以下本発明の実施例について詳述すれば下記の
通りである。
実施例 １
・鋼管材；材質SPCC、管寸度外径10ｍ／ｍ、肉
厚0.7ｍ／ｍ、長さ1000ｍ／ｍ、
・Cu電鍍膜；浴組成CuCN20ｇ／−NaCN2.5
ｇ／、液温60℃、PH値11、陰極電流密度
3A／ｄm2、時間４分、膜厚3μ、陽極Cu板
・フラツクス組成；ZnCl280％−NH4Cl20％から
なる水溶液
・熔融鍍膜；Pb70％、Sn5％、Zn25％からなる
三元合金
・鍍膜条件；熔融温度410℃、浸漬時間10秒、膜
厚8μ
・クロメート被膜；デイツプソール社製、品名Ｚ
−493、常温で20秒浸漬
実施例 ２
・鉄鋼材；材質SPC−１、冷間圧延鋼板で板厚
3.2ｍ／ｍ、巾100ｍ／ｍ、長さ800ｍ／ｍ
・フラツクス組成；実施例１に同じ
・熔融鍍膜；Pb80％、Sn10％、Zn10％からなる
三元合金
・鍍膜条件；熔融温度380℃、浸漬時間10秒、膜
厚10μ
・クロメート被膜；実施例１に同じ
以上それぞれの実施例による本発明品と前記し
たPb、Sn及びZnの積層からなる被膜構造を有す
る従来品との耐食性試験（JISZ−2371）結果を
示せば下記の通りである。
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a corrosion-resistant coated steel material, and more specifically, it is generally installed and used in large numbers as gas and liquid supply channels for automobiles and various other machines and equipment, and This invention relates to a corrosion-resistant coated steel pipe material with a relatively small diameter of about 20 m/m or less. Conventionally, such corrosion-resistant coated steel materials have been put into practical use, for example, with a coating structure consisting of a single layer, a composite layer, or a cross-layer alloy layer made of various metal materials, but these coated steel materials are generally not corrosion-resistant. There was a tendency to be unable to fully satisfy both of these requirements and workability. In addition, regarding the problems of solderability and corrosion resistance due to easy workability, the
Publication No. 29134 introduces a coating treatment method using a ternary alloy of Pb, Sn, and Zn.
Since the alloy has a laminated coating structure consisting of an Sn-Pb alloy layer as an upper layer, the surface of the Sn-Pb alloy layer located on the outer layer is related to the coating structure consisting of these laminated layers and solderability. It is not possible to apply a chromate coating to the steel surface, and therefore the corrosion resistance cannot be sufficiently exhibited.In addition, in particular, during post-processing of the product such as bending, buckling, expanding or drawing, it is often difficult to apply a chromate coating to the steel surface. This tends to cause peeling or cracking of the coating, and therefore, it is not practical in cases where such post-processing is required. The object of the present invention is to solve the above-mentioned problems by improving the respective contents of Pb and Zn, especially in relation to the small content of Sn, and by improving the immersion time. By creating a complete eutectic state, and by making it possible to form a chromate film on a molten coating film, it is possible to form a chromate film extremely easily and effectively. By providing a corrosion-resistant coated steel material that solves the problem, the drawings illustrating the corrosion-resistant coated steel pipe material as an embodiment of the present invention will be described in detail below.
is a steel material, and as the steel material, the surface 1'
It is a relatively small double-wound or single-ply pipe with a pipe diameter of about 20 m/m or less, which has or does not have an electroplated film 4 of Cu, and its surface 1' is coated with 70% to 80% Pb.
It has a molten coating film 2 in a perfect eutectic state consisting of a ternary alloy of 5% to 10% Sn and 10% to 25% Zn by weight, and a chromate coating 3 is formed on the surface 2' of the molten coating film. That's what happens. FIG. 4 shows a 400x microscopic photograph of the corrosion-resistant coated steel pipe material according to the example shown in FIG.
There is a molten plating film 2 (thickness: 30μ) in which a ternary alloy (10%) is in a perfect eutectic state, and a chromate film 3 is applied thereon. Note that 5 is a resin in which materials are embedded in order to take microscopic photographs. As described above, according to the steel material according to the present invention, the fused coating film 2 is made of a ternary alloy in a perfect eutectic state consisting of Pb and Zn, especially in relation to the small content of Sn. The complete chromate coating 3 structure on the top can significantly improve corrosion resistance, and since the bonding force with the surface 1' is strong, it will not bend, buckle or buckle as a product during post-processing.
There is no need to worry about peeling or cracking of the coating caused by tube expansion, drawing, etc., and therefore workability can be increased. Examples of the present invention will be described in detail below. Example 1 - Steel pipe material; material SPCC, pipe dimensions outer diameter 10 m/m, wall thickness 0.7 m/m, length 1000 m/m, - Cu electroplating film; bath composition CuCN20 g/-NaCN2.5
g/, liquid temperature 60℃, PH value 11, cathode current density
3A/dm 2 , time 4 minutes, film thickness 3μ, anode Cu plate, flux composition; aqueous solution/molten coating consisting of 80% ZnCl 2 - 20% NH 4 Cl; ternary alloy consisting of 70% Pb, 5% Sn, 25% Zn. Coating conditions: Melting temperature 410℃, immersion time 10 seconds, film thickness 8μ ・Chromate coating: Manufactured by Datepsol, product name Z
−493, 20 seconds immersion at room temperature Example 2 Steel material: Material SPC-1, cold rolled steel plate thickness
3.2 m/m, width 100 m/m, length 800 m/m ・Flux composition: Same as Example 1 ・Melted plating film: Ternary alloy consisting of Pb80%, Sn10%, Zn10% ・Plating film conditions: Melting temperature 380°C, Immersion time: 10 seconds, film thickness: 10μ Chromate film: Same as Example 1 Corrosion resistance test (JISZ −2371) The results are as follows. 【table】
第１図は本発明の一実施例に係る耐食性被覆鋼
管材の側面図、第２図は第１図のＡ−Ａ線上の一
部切欠きによる二重巻鋼管の拡大断面図、第３図
は他の実施例を示す同上一部切欠きによる一重鋼
管の拡大断面図、第４図は本発明の一実施例に係
る鋼管材の400倍顕微鏡写真である。
１……鋼管材、２……熔融鍍膜、３……クロメ
ート被覆、４……Cuの鍍金膜。
FIG. 1 is a side view of a corrosion-resistant coated steel pipe material according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a double-wound steel pipe taken along line A-A in FIG. 1, and FIG. FIG. 4 is an enlarged cross-sectional view of a single-walled steel pipe with a partial cutout shown in another embodiment, and FIG. 4 is a 400x microscopic photograph of a steel pipe material according to an embodiment of the present invention. 1... Steel pipe material, 2... Melt coating, 3... Chromate coating, 4... Cu plating film.
Claims (1)
１の表面１′に、Pb70％〜80％、Sn5％〜10％及
びZn10％〜25％の重量％からなる共晶状態にあ
る三元合金の熔融鍍膜２を有し、更に該熔融鍍膜
の表面２′にクロメート被膜３を施して形成して
なることを特徴とする耐食性被覆鉄鋼材。1. On the surface 1' of the steel material 1 with or without Cu electroplating film 4, a ternary element in a eutectic state consisting of 70% to 80% Pb, 5% to 10% Sn, and 10% to 25% Zn by weight. A corrosion-resistant coated steel material characterized in that it has a molten coating 2 of an alloy, and is further formed by applying a chromate coating 3 to the surface 2' of the molten coating.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57161497A JPS5950162A (en) | 1982-09-16 | 1982-09-16 | Corrosion-resistant coated steel material |
| GB08305121A GB2117414B (en) | 1982-03-26 | 1983-02-24 | Ferrous substrates hot dip coated with lead alloy |
| DE19833310048 DE3310048A1 (en) | 1982-03-26 | 1983-03-19 | CORROSION-RESISTANT COATED IRON-CONTAINING MATERIAL |
| FR8304906A FR2524007B1 (en) | 1982-03-26 | 1983-03-25 | CORROSION-RESISTANT COATED FERROUS MATERIALS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57161497A JPS5950162A (en) | 1982-09-16 | 1982-09-16 | Corrosion-resistant coated steel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5950162A JPS5950162A (en) | 1984-03-23 |
| JPH0250192B2 true JPH0250192B2 (en) | 1990-11-01 |
Family
ID=15736188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57161497A Granted JPS5950162A (en) | 1982-03-26 | 1982-09-16 | Corrosion-resistant coated steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5950162A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5129986A (en) * | 1974-09-06 | 1976-03-13 | Meidensha Electric Mfg Co Ltd | HIROSHIKENKI |
-
1982
- 1982-09-16 JP JP57161497A patent/JPS5950162A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5129986A (en) * | 1974-09-06 | 1976-03-13 | Meidensha Electric Mfg Co Ltd | HIROSHIKENKI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5950162A (en) | 1984-03-23 |
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