Choose the process by need
When parts need a polymer surface layer, dry-film lubrication, or surface cleaning and roughening of large parts, first choose the process by goal.
PEEK coating focuses on surface protection; MoS₂ coating on friction-pair lubrication; large-part blasting on cleaning and surface preparation before coating.
Quick comparison of three processes
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| Process | Main use | Evaluation focus |
|---|---|---|
| PEEK polymer coating | Forms a polymer coating on metal part surfaces | Substrate heat resistance, film thickness, adhesion, masking and dimensional change |
| MoS₂ dry-film coating | Dry-film lubrication of metal contact surfaces | Friction pair, load, motion type, coating system and curing conditions |
| Large-part blasting | Surface cleaning and roughening of large parts | Size and weight, lifting, current surface condition, cleanliness and roughness |
The three processes can be ordered separately or combined per project. The table gives selection directions; specific processes and acceptance criteria are agreed per drawing and sample.
PEEK polymer coating
Forms a PEEK polymer coating on metal workpiece surfaces, which can be evaluated for goals such as media resistance, surface protection and sliding contact. When using the powder coating route, surface preparation, spraying, melting and cooling must be determined by material data and workpiece structure.
Key points to confirm are substrate and heat treatment state, allowable thermal cycles, target thickness, masking areas and critical fit dimensions. Sample inspection covers coverage, adhesion, appearance and dimensional change after thermal cycling; bulk material properties cannot be taken directly as finished coating specifications.
MoS₂ dry-film coating
A dry-film coating with molybdenum disulfide as the solid lubricant, for discussing friction reduction, start-up lubrication and intermittent sliding of metal contact parts. The coating usually consists of a lubricant and a binder system; drying or curing conditions after spraying depend on the selected material.
When selecting, provide counterpart material, load, motion type, speed, operating temperature, contact media and allowable film thickness. Adhesion, thickness and actual friction and wear are confirmed on samples; the friction coefficient or temperature range of a single product is not applied.
Large-part blasting
For surface cleaning and roughening of large metal structural parts; rust, mill scale or old coatings can be removed as needed, and surfaces prepared for subsequent coating. Before blasting, contaminants such as grease should be removed first; abrasive and surface targets are then chosen by substrate, subsequent coating and acceptance requirements.
Please provide workpiece length, width, height, weight, lifting points, internal cavity and weld locations, current surface condition and target cleanliness or roughness. Whether the whole piece can be processed, whether zoned treatment is needed, and whether work is done on-site or in-plant must be confirmed with equipment working space, lifting conditions and samples.
How the three processes connect
PEEK and MoS₂ coatings can be evaluated by protection or lubrication goals respectively; large-part blasting can also serve as pretreatment for subsequent coatings. Whether to blast, and which abrasive and roughness to use, should be confirmed together with the adhesion requirements of the selected coating system.
When submitting drawings, please specify
- Substrate grade, workpiece dimensions and weight, quantity, and areas to be treated or masked.
- Target effect, operating temperature, contact media, load or wear mode.
- Film thickness and dimensional tolerance, or post-blasting cleanliness, roughness and subsequent coating requirements.
- Whether sampling is needed, inspection items and expected lead time.
To form a metal layer on a PEEK plastic substrate, see plastic surface metallization.
Limits of applicability
This page does not preset maximum equipment size or weight, nor promise uniform film thickness, temperature resistance or friction coefficient; processing scope and finished specifications are confirmed by the specific material, equipment conditions and sample inspection.
Selection notes
For protection needs, evaluate PEEK first; for dry-film friction reduction, MoS₂ first; for large-part cleaning or pre-coating treatment, blasting. Whether blasting is used as pre-coating treatment should be consistent with the surface requirements of the selected coating.