EP0174019B1 - Steel strip plated with a zinc-based coating layer containing an inorganic dispersoid - Google Patents

Steel strip plated with a zinc-based coating layer containing an inorganic dispersoid Download PDF

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Publication number
EP0174019B1
EP0174019B1 EP85111166A EP85111166A EP0174019B1 EP 0174019 B1 EP0174019 B1 EP 0174019B1 EP 85111166 A EP85111166 A EP 85111166A EP 85111166 A EP85111166 A EP 85111166A EP 0174019 B1 EP0174019 B1 EP 0174019B1
Authority
EP
European Patent Office
Prior art keywords
zinc
coating layer
steel strip
plated steel
surface coating
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
Application number
EP85111166A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0174019A1 (en
Inventor
Minoru C/O Nippon Steel Corporation Kitayama
Yasuhiko C/O Nippon Steel Corporation Miyoshi
Kazumi C/O Nippon Steel Corporation Nishimura
Yoshio C/O Nippon Steel Corporation Shindo
Fumio C/O Nippon Steel Corporation Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0174019A1 publication Critical patent/EP0174019A1/en
Application granted granted Critical
Publication of EP0174019B1 publication Critical patent/EP0174019B1/en
Expired legal-status Critical Current

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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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/265—After-treatment by applying solid particles to the molten coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02—Combined electrolytic and electrophoretic processes with charged materials

Definitions

  • the present invention relates to a zinc-plated steel strip with a zinc-based coating layer containing an inorganic dispersoid. More particularly, the present invention relates to a zinc-plated steel strip having at least one zinc-based coating layer containing fine inorganic dispersoid particles and formed on at least one surface of the steel strip, which zinc-plated steel strip exhibits excellent resistance to corrosion, enhanced workability, and superior weldability and is useful for producing cars, building and construction materials, and home electric appliances.
  • surface-treated steel strips are required to exhibit a high resistance to corrosion not only before but also after being painted. That is, surface coated steel strips have to exhibit a satisfactory paint adhesion and satisfactory resistances to perforation corrosion and to red rust when the paint film layer is scratched.
  • surface-treated steel strips must exhibit excellent workability and weldability.
  • Japanese Examined Patent Publication No. 56-49999 discloses a plated steel strip having an electroplating layer comprising a matrix consisting of zinc alone and 2.0 to 15% of Si0 2 particles, and optionally, an electroplating surface layer consisting of 1 g/m 2 or more of zinc alone.
  • Japanese Examined Patent Publication No. 57-17960 discloses a plated steel strip having a base plating layer consisting of zinc alone and a surface plating layer comprising a matrix consisting of Mn alone and particles consisting of at lesat one member selected from metallic Ni, Cu, AI and Cr and oxides of Ti, AI and Mg, and having a thickness of 0.1 ⁇ m or more.
  • Japanese Examined Patent Publication No. 46-37882 discloses a plated light metal article having a base plating layer consisting of zinc alone and a surface electroplating layer comprising a matrix consisting of nickel alone and a dispersoid consisting of solid particles having a size of 1 1l[11 or less and located in the surface portion of the surface electroplating layer.
  • Japanese Unexamined Patent Publication No. 56-123,395 discloses a plated steel strip having an electroplating layer comprising a matrix consisting of zinc alone or a Ni-Zn alloy and chromium hydrate particles having a size of 0.3 pm or more and dispersed in the surface portion of the layer with a depth of 0.3 pm from the surface of the layer.
  • Japanese Unexamined Patent Publication No. 52-109,439 discloses a plated metal article having a base electroplating layer consisting of nickel alone and a surface electroplating layer comprising a nickel matrix and silicon carbide particles.
  • a base electroplating layer consisting of nickel alone
  • a surface electroplating layer comprising a nickel matrix and silicon carbide particles.
  • the resultant plated steel strips are not always satisfactory in view of the strict requirements mentioned above.
  • JP-A-79 159 342 discloses a process for producing a corrosion resistant plated composite steel strip in which a surface of a steel strip substrate is coated with an electroplating layer comprising a matrix consisting of zinc and fine particles consisting of Si0 2 sol, Ti0 2 sol and Zr0 2 sol, and dispersed in the zinc matrix.
  • JP-A-79 146 228 discloses a plated steel strip in which a cold-rolled steel strip substrate is coated with an electroplating base layer consisting of a matrix consisting of zinc alone and Si0 2 fine particles, and the base layer is coated with an electroplating surface layer consisting of zinc alone.
  • Metal Finishing Abstracts vol. 22, No. 6, November/December 1980, page 292 discloses a plated steel strip comprising a steel strip substrate, an under-coating layer composed of a matrix consisting of zinc alone and AI 2 0 3 particles dispersed in the matrix, and an upper coating layer consisting of chromium alone.
  • An object of the present invention is to provide a zinc-plated steel strip which exhibits excellent resistance to corrosion even after the plated steel strip is painted and the paint film layer is scratched.
  • Another object of the present invention is to provide a zinc-plated steel strip which exhibits excellent workability and weldability.
  • the zinc-plated steel strip with a zinc-based coating layer of the present invention which comprises a substrate consisting of a steel strip and at least one surface coating layer plated on at least one portion of at least one surface of the steel strip substrate, the surface coating layer consisting essentially of a matrix consisting of at least one zinc alloy and fine dispersoid particles dispersed in the matrix and consisting of at least one member selected from the group consisting of oxides, carbides, nitrides, borides, phosphides, and sulfides of aluminum, iron, titanium, molybdenum, copper, zinc, nickel, cobalt, lanthanum, cerium and silicon.
  • the zinc-plated steel strip of the present invention may further comprise an intermediate coating layer formed between the steel strip substrate and the surface coating layer and consisting of at least one member selected from the group consisting of zinc and zinc alloys.
  • a zinc alloy-surface coating layer plated on a surface of a steel strip and containing specific inorganic dispersoid particles is highly effective for enhancing resistance of the steel strip to corrosion, especially perforation corrosion after the plated steel strip is painted and processed.
  • the reasons for the special effect of the above-mentioned specific zinc alloy coating layer are not completely clear. It is assumed, however, that the specific inorganic dispersoid particles in the surface coating layer form a sort of a barrier against the corrosion so as to restrict undesirable corrosional oxidation-reduction reaction in the coating layer. Also, it was found by the inventors of the present invention that the surface coating layer containing the specific fine inorganic dispersoid particles is effective for enhancing the weldability, especially spot weldability, of the plated steel strip.
  • an intermediate coating layer consisting of zinc or zinc alloy and formed between the steel strip substrate and the surface coating layer containing the specific inorganic dispersoid particles is highly effective for enhancing the specific effects of the surface coating layer, especially, for enhancing the resistance to perforation corrosion of the processed portion and the workability, of the plated steel strip.
  • the term "workability of the plated steel strip” refers to a resistance of the plated steel strip to powdering of the coating layer, that is, peeling of the coating layer from the substrate when processed.
  • the reasons for the above-mentioned effects of the intermediate coating layer are not clear. It is supposed, however, that the surface coating layer and the intermediate coating layer have a synergistic effect on, the plated steel strip. Also, it is supposed that the intermediate coating layer exhibits a special type of lubricating effect between the substrate and the surface coating layer.
  • a substrate consisting of a steel strip has at least one plated surface coating layer consisting essentially of a matrix consisting of a plated zinc alloy and fine dispersoid particles dispersed in the matrix and consisting of at least one member selected from oxides, carbides, nitrides, borides, phosphides and sulfides of aluminum (AI), iron (Fe), titanium (Ti), molybdenum (Mo), copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), lanthanum (La), cerium (Ce), and silicon (Si).
  • AI aluminum
  • Fe iron
  • Ti titanium
  • Mo molybdenum
  • Cu copper
  • Zn zinc
  • Ni nickel
  • Co cobalt
  • La lanthanum
  • Ce cerium
  • Si silicon
  • the steel strip usable as a substrate for the present invention is not limited to specific types of steel strips. However, usually, the steel strip is preferably selected from ordinary steel strips, AI-killed steel strips and high tensile steel strips.
  • the resultant surface coating layer exhibits an excellent effect in enhancing the resistance to corrosion and workability and weldability of the plated steel strip.
  • These effects of the surface coating layer of the present invention are excellent compared with those of other zinc or zinc alloy coating layers which are free from the specific inorganic dispersoid or contain other dispersoids.
  • the surface coating layer be in an amount of from 1 to 400 g/m 2 , and has a thickness of from 0.1 to 40 pm.
  • the matrix consists of a zinc alloy.
  • the zinc alloy is preferably selected from alloys of from 20% to 99.7% by weight of zinc with 0.3% to 80% by weight of at least one additional metal member selected from the group consisting of nickel, copper, cobalt, chromium, tellurium, lanthanium, cerium, iron, and manganese.
  • the above-mentioned specific additional metal in a content of from 0.3% to 80% by weight is effective for enhancing the paint adhesion of the surface coating layer to the steel strip substrate surface when the surface coating layer is scratched and for improving the resistance of the surface coating layer to corrosion, especially, to perforation corrosion within a strict corrosional environment.
  • the amount of inorganic dispersoid is preferably 0.01% or more, more preferably from 0.01 % to 95%, still more preferably from 0.01 % to 30%, based on the entire weight of the surface coating layer.
  • the resultant plated steel strip exhibits unsatisfactory weldability.
  • the content of the inorganic dispersoid does not exceed 95% based on the entire weight of the surface coating layer. Also, when the plated steel strip is required to have excellent resistance to powdering after the plated steel strip is strictly processed, it is preferable to limit the content of the inorganic dispersoid to 30% or less based on the entire weight of the surface coating layer.
  • the fine inorganic dispersoid particles in the surface coating layer preferably have an average size of 5 microns or less, preferably, from 0.01 to 1 Ilm. Fine inorganic dispersoid particles having an average size of 51lm or less are highly effective for enhancing the resistance of the resultant plated steel strip to powdering when the strip is subjected to severe processing.
  • the term "average size" refers to a size of the particles in a largest distribution percentage.
  • the surface coating layer of the present invention may cover the entire surface of the steel strip substrate. Otherwise, the surface of the steel strip substrate may be partially covered by the surface coating layer, for example, in the form of a plurality of stripes.
  • an intermediate coating layer consisting of zinc or a zinc alloy may be formed between the steel strip substrate and the surface coating layer.
  • the intermediate coating layer may be formed so as to partially cover or entirely cover the surface of the steel strip substrate.
  • the intermediate coating layer consists of zinc or a zinc alloy.
  • the zinc alloy is selected from alloys of 20% to 99% by weight of zinc and 1 % to 80% by weight of at least one metal other than zinc, preferably selected from the group consisting of nickel, cobalt, chromium, iron, and molybdenum.
  • the intermediate coating layer is preferably in an amount of from 0.5 to 400 g/m 2 , more preferably, from 1 to 200 g/m 2 , and preferably has a thickness of from 0.1 to 20 pm.
  • the surface coating layer in the zinc-plated steel strip of the present invention may have a covering layer formed thereon by means of a silane-coupling treatment or a chemical conversion treatment.
  • silane-coupling treatment refers to a treatment of the surface of the surface coating layer with a silane-coupling agent, for example, vinylchlorosilane or vinyltrimethoxysilane.
  • chemical conversion treatment refers to a phosphate treatment or a chromate treatment applied to the surface coating layer of the plated steel strip.
  • the silane-coupling treatment and chemical conversion treatment are effective for enhancing the primary adhering property of the surface of the plated steel strip to lacquer.
  • the surface coating layer can be produced on a surface of the steel strip substrate by means of an electric plating or a vacuum evaporation plating procedure in the presence of fine inorganic dispersoid particles.
  • the electric plating method is applied to the production of the surface coating layer.
  • the electric plating procedure is carried out in a plating bath containing sulfate or chloride of zinc and at least one additional metal having a pH of 1 to 3 at a current density of 1 to 200 A/dm 2 at a line speed of 1 to 250 m/min.
  • the inorganic dispersoid particles are deposited in the plated metal matrix. It is assumed that the dispersoid particles are deposited due to the attraction caused by static electricity or the mechanical force applied thereto.
  • the intermediate coating layer can be produced by means of electric plating, vacuum evaporation plating, or hot galvanizing.
  • the zinc-plated steel strip of the present invention may have only one surface coating layer formed on only one surface of the substrate, two surface coating layers formed on both the surfaces of the substrate, or a combination of a surface coating layer and an intermediate coating layer formed on only one surface of the substrates or on each surface of the substrate.
  • the other surface of the substrate may be plated with a coating layer other than the surface coating layer and the intermediate coating layer of the present invention or with the same coating layer as the intermediate coating layer of the present invention.
  • the resistance of a specimen to corrosion was determined as follows.
  • a specimen was subjected to a dipping type chemical conversion treatment with zinc phosphate.
  • the treatment specimen was coated with a cathodic ED coating layer having a thickness of 20 pm.
  • the painted specimen was subjected to a cyclic corrosion test (CCT) in which a salt spray test was combined with a drying-wetting-cooling test.
  • CCT cyclic corrosion test
  • the specimen was tested for perforation corrosion of the processed portion of the steel strip was of a lapped panel. This test was carried out over 4 weeks, and the maximum depth of pits formed in the specimen was measured. The workability of the specimen was evaluated by a deep drawing test.
  • the resistance of the deep drawn specimen to powdering was determined by a tape test.
  • the weldability of the specimen was determined as follows. Two zinc-plated specimens were laid back to back with the plated surfaces outside. These were then spot-welded. The size of the nuggets formed in the welded portion was measured to determine the appropriate welding current for the specimens.
  • the surface rusting test was carried out by a cross-cut method.
  • the paint adhesion of the scratched portion of the specimen was determined by a cross-cut method in which the cross-cut specimen was subjected to the CCT for 4 weeks and the maximum width of blisters formed in the specimen was measured.
  • the results of the above-mentioned tests were evaluated as follows:
  • the content of the inorganic dispersoid particles in the surface coating layer be 0.01 % or more, based on the entire weight of the surface coating layer, in order to enhance the weldability of the plated steel strip.
  • Tn view of Examples 17 to 23 it is preferable for the purpose of improving the perforation corrosion resistance of the processed portion of the plated steel strip to control the content of the inorganic dispersoid particles to a level not exceeding 95% based on the entire weight of the surface coating layer.
  • Example 34 to 164 except for Examples 116, 118, and 120 to 140, a surface of a substrate consisting of an ordinary steel strip was plated with an intermediate coating layer having the composition and thickness as shown in Table 2 (1) to (9) and then with a surface coating layer having the composition and thickness shown in Table 2.
  • Comparative Examples 1 to 6 the same substrate as that mentioned above was plated with an intermediate coating layer and then with a surface coating layer each having the composition and thickness in Table 2(7).
  • Example 116 a surface of the substrate was covered partially with the intermediate coating layer at a covering rate of 50%.
  • Comparative Example 1 wherein the intermediate coating layer contains Si0 2 particles whereas the surface coating layer is free from the inorganic dispersoid particles, the resultant plated steel strip exhibited a very poor perforation corrosion resistance, whereas the paint adhesion of the scratched portion to lacquer was excellent.
  • the surface coating layer contained no inorganic dispersoid. This feature resulted in poor weldability of the resultant plated steel strip.
  • the preferable dispersoids for the zinc-nickel alloy matrix in the surface coating layer are oxides of aluminum, iron, titanium, and silicon.
  • the preferable metals to be alloyed with zinc in the surface coating layer are nickel, cobalt, chromium, iron, and manganese.
  • the resultant plated steel strips having an intermediate coating layer consisting of zinc or a zinc alloy and a surface coating layer containing dispersoid particles consisting of Si0 2 and having an average size of 5 microns or less exhibited excellent corrosion resistance, workability, and weldability and, therefore, are most preferable products of the present invention.
  • the preferable thickness of the surface coating layer is in the range of from 0.1 to 40 microns. Also, in view of Examples 141 to 145, it is preferable that the thickness of the intermediate coating layer is in the range of from 0.1 to 20 microns.
  • Examples 116 and 117 showed that the plated steel strips having surface and intermediate coating layers or a surface coating layer in the form of a plurality of stripes are satisfactory.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP85111166A 1984-09-06 1985-09-04 Steel strip plated with a zinc-based coating layer containing an inorganic dispersoid Expired EP0174019B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP185300/84 1984-09-06
JP59185300A JPS6164899A (ja) 1984-09-06 1984-09-06 Ｚｎ系複合めつき鋼板

Publications (2)

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EP0174019A1 EP0174019A1 (en) 1986-03-12
EP0174019B1 true EP0174019B1 (en) 1989-03-01

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EP85111166A Expired EP0174019B1 (en) 1984-09-06 1985-09-04 Steel strip plated with a zinc-based coating layer containing an inorganic dispersoid

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EP (1) EP0174019B1 (enrdf_load_stackoverflow)
JP (1) JPS6164899A (enrdf_load_stackoverflow)
DE (1) DE3568459D1 (enrdf_load_stackoverflow)

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GB2206127A (en) * 1987-06-25 1988-12-29 Occidental Chem Co Improved electrogalvanized coating for steel
FR2617193A2 (fr) * 1987-06-25 1988-12-30 Occidental Chem Co Revetement ameliore par galvanisation a chaud au trempe pour acier
US4800134A (en) * 1987-04-13 1989-01-24 Teruaki Izaki High corrosion resistant plated composite steel strip
GB2209178A (en) * 1987-08-28 1989-05-04 Occidental Chem Co Improved hot-dip galvanized coating for steel
FR2623822A1 (fr) * 1987-11-26 1989-06-02 Nippon Steel Corp Tole d'acier electroplaquee a placage composite a base zn-ni et son procede de fabrication
US4839241A (en) * 1987-05-11 1989-06-13 Nippon Kokan Kabushiki Kaisha Composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance
US4868066A (en) * 1987-10-19 1989-09-19 Macdermid, Incorporated Mechanically plated coatings containing lubricant particles
GB2178760B (en) * 1985-08-05 1989-12-20 Usui Kokusai Sangyo Kk Multilayered coated corrosion resistant steel material
US4897317A (en) * 1987-03-31 1990-01-30 Nippon Steel Corporation Corrosion resistant Zn-Cr plated steel strip
US4904545A (en) * 1987-07-10 1990-02-27 Nkk Corporation Composite electroplated steel sheet
US4908279A (en) * 1986-12-06 1990-03-13 Nisshin Steel Co., Ltd. Multilayer electroplated steel sheet
US4910095A (en) * 1987-12-29 1990-03-20 Nippon Steel Corporation High corrosion resistant plated composite steel strip
US4915906A (en) * 1988-06-17 1990-04-10 Canadian Patents And Development Limited/Societie Canadienne Des Brevets Et D'exploitation Limitee Novel zinc-based alloys, preparation and use thereof for producing thermal-sprayed coatings having improved corrosion resistance and adherence
FR2641547A1 (fr) * 1989-01-10 1990-07-13 Maubeuge Fer Produit galvanise peint a haute protection
US5006420A (en) * 1989-06-21 1991-04-09 Nkk Corporation Electroplated steel sheet having a plurality of coatings, excellent in workability, corrosion resistance and water-resistant paint adhesivity
US5134039A (en) * 1988-04-11 1992-07-28 Leach & Garner Company Metal articles having a plurality of ultrafine particles dispersed therein
US5429881A (en) * 1990-05-23 1995-07-04 Toyota Jidosha Kabushiki Kaisha Surface treated aluminum or aluminum alloy material
US6468674B2 (en) 1999-10-07 2002-10-22 Bethlehem Steel Corporation Coating composition for steel—product, a coated steel product, and a steel product coating method
US6689489B2 (en) 1999-10-07 2004-02-10 Isg Technologies, Inc. Composition for controlling spangle size, a coated steel product, and a coating method
US7118807B2 (en) 2000-11-13 2006-10-10 Dacral, S.A. Use of MoO3 as corrosion inhibitor, and coating composition containing such an inhibitor

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JPS63192900A (ja) * 1987-02-05 1988-08-10 Nippon Steel Corp めつき密着性、塗装後耐食性に優れた複層めつき鋼板
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JPS63243299A (ja) * 1987-03-30 1988-10-11 Nippon Steel Corp 複合メッキ鋼板の製造方法
US4794050A (en) * 1987-06-08 1988-12-27 Occidental Chemical Corporation Resistance welding of galvanized steel
JPH0238598A (ja) * 1988-07-28 1990-02-07 Nkk Corp 高耐食性複層亜鉛めっき鋼板
FR2766844B3 (fr) * 1997-07-29 1999-05-28 Lorraine Laminage Tole luminescente economique et resistant a l'usure, procede de fabrication et utilisations
GB2340131A (en) * 1998-07-29 2000-02-16 Ford Motor Co Corrosion resistant surface coating based on zinc
DE10000791A1 (de) * 2000-01-11 2001-07-19 C & C Cours Gmbh Leuchtende Metalloberflächen
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CA2391476C (en) * 2002-03-25 2007-08-07 Bethlehem Steel Corporation A coating composition for steel product, a coated steel product, and a steel product coating method
FR2839729B1 (fr) * 2002-05-16 2005-02-11 Univ Toulouse Procede de protection d'un substrat en acier ou alliage d'aluminium contre la corrosion permettant de lui conferer des proprietes tribologiques, et substrat obtenu
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Cited By (30)

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Publication number Priority date Publication date Assignee Title
GB2178760B (en) * 1985-08-05 1989-12-20 Usui Kokusai Sangyo Kk Multilayered coated corrosion resistant steel material
EP0293476A4 (en) * 1986-12-06 1991-03-13 Nisshin Steel Co., Ltd. Double-electroplated steel plate
US4908279A (en) * 1986-12-06 1990-03-13 Nisshin Steel Co., Ltd. Multilayer electroplated steel sheet
US4897317A (en) * 1987-03-31 1990-01-30 Nippon Steel Corporation Corrosion resistant Zn-Cr plated steel strip
US4800134A (en) * 1987-04-13 1989-01-24 Teruaki Izaki High corrosion resistant plated composite steel strip
EP0291606A3 (en) * 1987-04-13 1990-01-17 Nippon Steel Corporation High corrosion resistant plated composite steel strip and method for producing same
US4839241A (en) * 1987-05-11 1989-06-13 Nippon Kokan Kabushiki Kaisha Composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance
GB2206127B (en) * 1987-06-25 1991-11-27 Occidental Chem Co Improved electrogalvanized coating for steel
FR2617195A1 (fr) * 1987-06-25 1988-12-30 Occidental Chem Co Revetement electrogalvanise ameliore pour acier
US4873153A (en) * 1987-06-25 1989-10-10 Occidental Chemical Corporation Hot-dip galvanized coating for steel
GB2206127A (en) * 1987-06-25 1988-12-29 Occidental Chem Co Improved electrogalvanized coating for steel
FR2617193A2 (fr) * 1987-06-25 1988-12-30 Occidental Chem Co Revetement ameliore par galvanisation a chaud au trempe pour acier
US4904545A (en) * 1987-07-10 1990-02-27 Nkk Corporation Composite electroplated steel sheet
GB2209178A (en) * 1987-08-28 1989-05-04 Occidental Chem Co Improved hot-dip galvanized coating for steel
GB2209178B (en) * 1987-08-28 1991-09-11 Occidental Chem Co Improved hot-dip galvanized coating for steel
US4868066A (en) * 1987-10-19 1989-09-19 Macdermid, Incorporated Mechanically plated coatings containing lubricant particles
GB2212816B (en) * 1987-11-26 1992-04-08 Nippon Steel Corp Zn-ni based composite electroplated material and multi-layer composite plated material
FR2623822A1 (fr) * 1987-11-26 1989-06-02 Nippon Steel Corp Tole d'acier electroplaquee a placage composite a base zn-ni et son procede de fabrication
GB2212816A (en) * 1987-11-26 1989-08-02 Nippon Steel Corp Zn-Ni based composite electroplated material and multi-layer composite plated material
US4910095A (en) * 1987-12-29 1990-03-20 Nippon Steel Corporation High corrosion resistant plated composite steel strip
US5082536A (en) * 1987-12-29 1992-01-21 Nippon Steel Corporation Method of producing a high corrosion resistant plated composite steel strip
US5134039A (en) * 1988-04-11 1992-07-28 Leach & Garner Company Metal articles having a plurality of ultrafine particles dispersed therein
US4915906A (en) * 1988-06-17 1990-04-10 Canadian Patents And Development Limited/Societie Canadienne Des Brevets Et D'exploitation Limitee Novel zinc-based alloys, preparation and use thereof for producing thermal-sprayed coatings having improved corrosion resistance and adherence
FR2641547A1 (fr) * 1989-01-10 1990-07-13 Maubeuge Fer Produit galvanise peint a haute protection
US5006420A (en) * 1989-06-21 1991-04-09 Nkk Corporation Electroplated steel sheet having a plurality of coatings, excellent in workability, corrosion resistance and water-resistant paint adhesivity
US5429881A (en) * 1990-05-23 1995-07-04 Toyota Jidosha Kabushiki Kaisha Surface treated aluminum or aluminum alloy material
US6468674B2 (en) 1999-10-07 2002-10-22 Bethlehem Steel Corporation Coating composition for steel—product, a coated steel product, and a steel product coating method
US6689489B2 (en) 1999-10-07 2004-02-10 Isg Technologies, Inc. Composition for controlling spangle size, a coated steel product, and a coating method
US7118807B2 (en) 2000-11-13 2006-10-10 Dacral, S.A. Use of MoO3 as corrosion inhibitor, and coating composition containing such an inhibitor
US7250076B2 (en) 2000-11-13 2007-07-31 Dacral Use of MoO3 as corrosion inhibitor, and coating composition containing such an inhibitor

Also Published As

Publication number Publication date
EP0174019A1 (en) 1986-03-12
JPS6164899A (ja) 1986-04-03
DE3568459D1 (en) 1989-04-06
JPS6316479B2 (enrdf_load_stackoverflow) 1988-04-08

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