Racking & conductivity
Define reliable contact points and loading while controlling rack marks, throughput and cavity drainage.
MAGNESIUM SURFACE ENGINEERING
Magnesium Cathodic E-Coating
An integrated review of cleaning, passivation, cathodic e-coating, curing and packing to reduce blistering, peeling and batch variation.
Engineering priorities for cathodic e-coating
E-coating supports complex geometries and batch consistency, but pretreatment, rack conductivity, cavity drainage, masking, film build and curing must be evaluated as one system.
Film build & appearance
Review edges, deep holes, cavities, liquid traps and critical cosmetic surfaces for coating uniformity.
Cure & material risk
Assess how curing conditions affect film performance, distortion, inserts and assembly dimensions.
Passivation + e-coating
For higher corrosion and appearance requirements, we can evaluate a combined passivation and cathodic e-coat route through sample validation.
Defect investigation
Blisters, peeling, pinholes, runs, craters, weak edge coverage and colour variation require a combined review of incoming parts, pretreatment, bath condition, racking, curing and packaging.
FREQUENTLY ASKED QUESTIONS
Technical FAQs
Process parameters, test methods and acceptance criteria are confirmed against representative samples, drawings and the agreed quality specification.
Can magnesium be e-coated directly?
A suitable cleaning and conversion-coating pretreatment is normally evaluated first to improve substrate stability and coating adhesion.
Can e-coating reach complex cavities?
E-coat has throwing power, but geometry, drainage, racking, electrical field and process conditions still require sample confirmation.
Is a thicker e-coat always better?
No. Film build must balance corrosion, appearance, fit, edge coverage, cure and cost.
REQUEST AN ENGINEERING REVIEW
Send your part details and drawing
Please include the alloy grade, application, target process, estimated volume, appearance standard and corrosion requirements. For confidential drawings, contact us before transfer.
Phone / WeChat: +86 13724861913