E-Coating (Electrophoretic Coating)

Cathodic electrophoretic coating — e-coat, also written EPD — applied by an audited partner. The paint is deposited electrically instead of sprayed, so cut edges, weld seams and recesses get the same film build as flat faces. That is why it is specified on stamped and deep-drawn parts that have to survive salt spray, and as the layer under a powder or wet-paint topcoat. Balford confirms coating type, film thickness and masking against the drawing before tooling is cut.

PARTNERS

Partner Suppliers

Qualified partners for electrophoretic coating.

SURFACE TREATMENT · E-COATING

Zhejiang Dongsheng Technology

Zhuji, Zhejiang, China

Zhejiang Dongsheng Technology Co., Ltd. — electrophoretic coating plant in Ciwu Town, Zhuji, on the same industrial patch as Balford. Automatic e-coating line with its own control room.

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WHERE IT FITS

Where E-Coating Fits

E-coat is a corrosion-protection layer rather than a decorative finish. It is specified when the whole part has to be covered — including cut edges and the inside of a drawn cup — and when the coating has to sit under a topcoat.

Typical reasons to specify it

Uniform film on cut edges, weld seams and recesses
Corrosion protection on steel before assembly
Base layer under powder coating or wet paint
Coverage inside deep-drawn housings

What the drawing has to define

Coating type and colour
Target film thickness
Surfaces to be masked — threads, sealing faces, grounding points
Cure schedule and any hardness or salt-spray requirement

E-coating is an outsourced process and is declared as such, together with heat treatment, plating, passivation, electropolishing, phosphating and liquid painting. Powder coating is split: large sheet-metal parts are coated in Balford's own manual booth, small parts go to a qualified partner.

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This partner is part of Balford’s managed finishing network — see how outsourced metal finishing and secondary operations are controlled, inspected and documented.