ALKA · AUSTRALIAN COATINGS MANUFACTURER
Crushers & Screens
Protect external steel around demanding processing equipment.
SERVICE & APPLICATIONS
Protection matched to the asset.
Crusher housings, screen frames and access structures face weather, dust and frequent maintenance. ALKA systems address external corrosion protection and refurbishment while the primary crushing and screening surfaces remain a separate wear-engineering duty.
Housings and frames
Select primer and barrier protection for the external steel, cleaning conditions and required finish.
Access structures
Platforms and support steel need detail coverage and inspection access around difficult geometry.
Refurbishment
Remove grease, dust and unsound coatings before repairing prepared external surfaces.
ALKYD PRIMERS · ENAMELS · SINGLE-PACK FINISHING
Finish the housing; specify wear surfaces separately
External covers, dry guards, access components and selected service frames can be assessed for single-pack industrial enamel finishes. This is a component finishing route, with attention to preparation and maintenance; it does not replace the materials used for crushing, screening or abrasive process contact.
Products to assess for the job
- ALKA 401 · Alkyd zinc phosphate primer
Prepared carbon steel; a corrosion-inhibiting primer for compatible alkyd and enamel finishing routes.
- ALKA 410 · Rapid-cure protective enamel
A gloss finishing option for machinery, fabricated components and maintenance work over a compatible prepared and primed surface.
- ALKA 411 · Satin black / chassis enamel
A black finishing option for chassis, frames, transport assemblies and suitable equipment refurbishment.
- ALKA 415 · Hammer-tone finish
A decorative textured finish for machine covers, cabinets, enclosures and fabricated metal items where appearance is part of the brief.
Select a complete, compatible primer and finish. The products above are options by role, not a blanket approval to combine every primer and topcoat.
What the applicator or specifier needs
Map impact, abrasion, vibration-related damage and washdown by component. Protect identification plates and functional interfaces in the work plan.
Remove grease and accumulated fines before preparation. Detail edges, welds and inaccessible undersides, and inspect the substrate before covering corrosion.
Agree how components will be supported during drying, handled for installation and touched up after assembly. Avoid releasing coated parts on touch-dry appearance alone.
Write a usable coating schedule
Specify the substrate and preparation, exact primer and finish, individual-coat dry-film thickness, application method, thinning limits, recoat interval and service-cure requirement from current product data. For repainting, document the retained coating and a representative compatibility trial before full application.
Choose the coating for the exposure
Crushing faces, screens, chutes and severe abrasion zones need their specified wear materials or a separately reviewed protective system.
A single-pack route can simplify small batches and routine repainting because it does not require mixing a separate hardener. It still depends on sound preparation, suitable film build and the correct recoat window. Where exposure or the required maintenance interval is more demanding, assess the relevant two-pack epoxy, polyurethane or specialist lining system.
Does fast drying mean the part is ready for service?
No. Touch-dry, recoatable, handleable and fully cured describe different stages. Use the selected product data and actual application conditions to plan each stage. Excessive film build, early overcoating or premature handling can compromise the finish; adding extra thinner or a hardener is not a substitute for the specified application procedure.
SELECT THE COMPLETE BUILD
ALKA systems for this application.
| System | Why select it | Coating build | Total DFT |
|---|---|---|---|
| ALKA-9931 General Industrial | Balanced protection, appearance and cost without requiring a zinc-rich primer Prepared steel; moderate internal or external industrial atmospheric exposure | Alka 416 single-pack epoxy coating → Alka 413 high-build epoxy → Alka 421 polyurethane finish | 225–275 µm |
| ALKA-9932 Maintenance / Refurbishment | Reduces preparation demands and supports practical maintenance programs Existing steel where full abrasive blasting is restricted; hand- or power-tool prepared areas | Alka 412 surface-tolerant epoxy × 2 coats → optional Alka 421 polyurethane finish | 200–400 µm plus optional 50–75 µm finish |
| ALKA-9933 High-Barrier Atmospheric | MIO barrier technology improves resistance to moisture, oxygen and salt penetration Prepared steel in industrial, marine-atmospheric and salt-laden environments above the waterline | Alka 404 or Alka 416 primer → Alka 413 MIO high-build epoxy barrier coat | 225–275 µm |
DFT = dry-film thickness. These are nominal system totals; individual-coat thicknesses and application conditions belong in the final coating schedule.
SPECIFICATION & APPLICATION
From surface preparation to return to service.
Build the coating schedule around the substrate and the work that can be achieved on site. For refurbishment, assess the adhesion and compatibility of retained coatings before defining repair boundaries.
- 01External surface boundaries
- 02Cleaning and contamination
- 03Temperature and equipment requirements
- 04Direct impact and wear exclusions
Record surface preparation, environmental conditions, coverage at details and coat thickness. Allow for the specified recoat and cure periods, then inspect and repair defects before release to service.
A coordinated coating build
Schematic, not to scale. Follow the selected system for products, layer count and thickness.
TECHNICAL QUESTIONS
Details that affect system selection.
Why separate corrosion protection and wear protection?
They address different failure mechanisms. Paint can protect prepared external steel from its environment, while direct mineral impact and cutting abrasion may require wear-resistant components or dedicated lining technology.
What belongs in the final technical submission?
Include current TDS and SDS, substrate preparation, the product and thickness schedule, application conditions, inspection criteria and cure requirements. For chemical or immersed service, include written suitability for the actual exposure. Any required certification or durability commitment must be supported by the relevant evidence.
Do not use these coating schedules as a specification for crushing faces, screen media, bearings or high-impact mineral-contact surfaces. Follow the equipment design and OEM requirements for those parts.
PRODUCTS & TECHNICAL DOCUMENTS
Go directly to the product information.
Open the relevant product page for its published information and available documents. Request the current TDS and SDS set for the specified products before procurement.
MANUFACTURER TECHNICAL SUPPORT
Turn the service conditions into a coating specification.
Send the asset, substrate, exposure and maintenance window. ALKA can help define the coating build, preparation and technical documentation for your review.