Corrosion baseline
A controlled conversion reaction forms a continuous film and reduces the risk of rapid oxidation on bare magnesium.
MAGNESIUM SURFACE ENGINEERING
Magnesium Alloy Passivation & Conversion Coating
Project validation around substrate condition, cleaning, film uniformity, corrosion requirements and subsequent coating.
What magnesium passivation is designed to do
A conversion film can improve the corrosion-protection baseline and prepare the surface for subsequent coating. Results also depend on substrate quality, casting defects, cleaning and the validated process window.
Coating adhesion
The pretreatment creates a suitable surface for e-coating or other finishes and helps reduce blistering and delamination risks.
Chromium-free options
Chromium-free systems can be evaluated against the customer's restricted-substance and performance requirements.
Typical parts for review
Automotive die-cast housings, brackets, consumer-electronics structures, robotics parts, UAV components and other lightweight magnesium parts.
Criteria to confirm
Appearance, colour uniformity, electrical requirements, adhesion, corrosion target, subsequent coating, assembly surfaces, packaging and transport conditions.
FREQUENTLY ASKED QUESTIONS
Technical FAQs
Process parameters, test methods and acceptance criteria are confirmed against representative samples, drawings and the agreed quality specification.
Can passivated magnesium be used without another coating?
It depends on the environment and performance target. Higher corrosion or cosmetic requirements may need a combined e-coating system.
Does passivation affect conductivity?
Film chemistry and thickness can affect electrical performance, so contact areas and test methods must be defined.
Does chromium-free always meet every environmental requirement?
No. Compliance must be checked against the customer's restricted-substance list and required declarations or tests.
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