Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B05
SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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B05D
PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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2701/00
Coatings being able to withstand changes in the shape of the substrate or to withstand welding
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B05D2701/40
withstanding welding
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B05D2701/40

Coated steel sheet and painted member
11555125 · 2023-01-17 · ·

A coated steel sheet has a coating film on at least one side of a plated steel sheet. The coating film contains a binder resin, non-oxide ceramic particles containing V (excluding VC particles), and doped zinc oxide particles. The respective contents of the non-oxide ceramic particles containing V and the doped zinc oxide particles relative to the coating film satisfy the expressions: [(1) C.sub.Zn≥10.0, (2) C.sub.V≤0.5.Math.C.sub.Zn, (3) C.sub.V≤70−C.sub.Zn, (4) C.sub.V≥0.125.Math.C.sub.Zn, and (5) C.sub.V≥2.0], where C.sub.V represents the content (mass %) of the non-oxide ceramic particles containing V, and C.sub.Zn represents the content (mass %) of the doped zinc oxide particles. The coated steel sheet is excellent in both corrosion resistance before electrodeposition coating, and weldability.

COATED STEEL SHEET AND PAINTED MEMBER
20190330478 · 2019-10-31 · ·

A coated steel sheet has a coating film on at least one side of a plated steel sheet. The coating film contains a binder resin, non-oxide ceramic particles containing V (excluding VC particles), and doped zinc oxide particles. The respective contents of the non-oxide ceramic particles containing V and the doped zinc oxide particles relative to the coating film satisfy the expressions: [(1) C.sub.Zn10.0, (2) C.sub.V0.5.Math.C.sub.Zn, (3) C.sub.V70C.sub.Zn, (4) C.sub.V0.125.Math.C.sub.Zn, and (5) C.sub.V2.0], where C.sub.V represents the content (mass %) of the non-oxide ceramic particles containing V, and C.sub.Zn represents the content (mass %) of the doped zinc oxide particles. The coated steel sheet is excellent in both corrosion resistance before electrodeposition coating, and weldability.