Frequently Asked Questions

Barrel Plating and Rack Plating are the two primary methodologies used in electroplating, each tailored for different component geometries, volumes, and requirements:

• Rack Plating: Involves mounting components individually on custom-designed metal jigs or copper racks. These racks are suspended in the electroplating bath, ensuring direct electrical contact for each part. This method is highly recommended for large, heavy, intricate, or delicate components that could scratch or deform if tumbled. It is the ideal choice for high-precision components like aerospace brackets, brass sanitary valves, and automotive exterior parts where aesthetic uniformity and exact thickness control are paramount.
• Barrel Plating: Involves placing a bulk batch of small components inside a perforated, rotating barrel that is submerged in the plating bath. As the barrel rotates, the parts tumble over each other, establishing electrical contact. This method is extremely cost-effective for high-volume batches of small items such as fasteners, screws, bolts, stampings, and minor brass components.

We offer highly customizable plating thicknesses tailored to specific performance requirements and environmental exposures, fully adhering to standard industrial specifications:

• Rack Nickel Plating: We offer thickness ranges from 5 microns (for mild indoor, non-corrosive environments) up to 25+ microns (for harsh, high-wear industrial and marine environments). Our nickel plating complies with ASTM B689 and ISO 1456 standards, ensuring consistent grain structure and superior adhesion.
• Rack Chrome Plating: Our chrome plating involves a multi-layer system where a base layer of bright copper/nickel is applied followed by a micro-cracked chromium layer (typically 0.3 to 0.5 microns). This structure meets ASTM B456 standards, providing high surface hardness, low friction, and salt spray performance exceeding 96 to 120 hours without red rust.

Zinc plating protects steel parts through a process called galvanic or "sacrificial" protection. Because zinc is more chemically active than iron/steel, the zinc coating will corrode and oxidize first, sacrificing itself to shield the underlying steel from moisture, oxygen, and rust.

To extend the life of the zinc layer, we apply a chemical passivation conversion coating. We offer three primary passivation choices:

• Trivalent Blue/Bright Passivation: A modern, eco-friendly finish that provides a sleek silver-blue aesthetic. It offers excellent mild corrosion protection, typical of indoor and light industrial machinery.
• Trivalent Yellow/Rainbow Passivation: Provides an iridescent yellow-gold finish. This coating contains higher corrosion resistance than blue passivation, suitable for under-the-hood automotive parts and outdoor fittings.
• Black Passivation: A deep black finish that is highly valued for both its premium aesthetic appeal and its robust resistance to rust, commonly used in automotive brackets.

Tin Cobalt Plating is a specialized electrolytic alloy coating (approximately 70-80% tin and 20-30% cobalt) that is highly sought after as a modern, eco-friendly, and cost-effective alternative to decorative chromium. Key advantages include:

• Aesthetic Brilliance: It provides a brilliant, blue-white metallic finish that is virtually indistinguishable from traditional bright chrome.
• Superior Throwing Power: It possesses exceptional "throwing power," meaning it can deposit a highly uniform layer inside deep recess cavities, complex internal threads, and intricate geometries where traditional chrome struggles to reach.
• Environmental Compliance: Unlike older hexavalent chromium processes, tin-cobalt alloys are entirely non-toxic and compliant with international environmental directives such as RoHS and REACH.

Yes, we provide certified Hydrogen Embrittlement Relief Baking. When high-strength steels (typically those with tensile strengths exceeding 1000 MPa or hardness above 31 HRC, such as grade 10.9 or 12.9 bolts and spring steels) are subjected to acid cleaning and electroplating, atomic hydrogen is generated and absorbed into the metal's crystalline structure. Under tension, this trapped hydrogen can cause micro-cracking and sudden failure under load.

To prevent this, we bake plated parts in our calibrated industrial ovens at temperatures ranging from 190°C to 220°C for a duration of 4 to 24 hours. Crucially, this baking process is initiated within a strict 3-to-4-hour window immediately after electroplating and prior to any passivation treatment, ensuring the hydrogen atoms are safely driven out of the steel.

We specialize in plating a wide variety of base metal substrates. Our facility is fully optimized to process:

• Copper and Copper Alloys: Including brass and bronze, which are a major specialty in Jamnagar's manufacturing hub.
• Mild Steels, Carbon Steels, and Alloy Steels.
• Stainless Steel: Using specialized Wood's nickel strike pre-treatments to ensure robust molecular adhesion.

Substrate Limitations: At this time, we do not directly plate pure aluminum, magnesium alloys, titanium, or non-conductive materials like plastics. Additionally, cast iron parts must be evaluated on a case-by-case basis due to surface porosity.

Our quality assurance laboratory executes rigorous inspections on every batch to ensure conformity to client drawings and industrial specs:

• Thickness Verification: We utilize digital thickness meters and microscopic cross-section analysis to verify that the plated deposit matches drawing specifications in microns.
• Adhesion Testing: We conduct mechanical adhesion checks, including thermal shock testing (heating and quenching components to check for blistering), bend tests, and burnish tests to ensure the molecular bond between the plating and base metal is absolute.
• Corrosion Resistance Testing: We operate salt spray chambers that perform accelerated corrosion testing under ASTM B117 standards to confirm our coatings meet the required hours of salt spray exposure without rusting.

Yes, our in-house tooling and jigging shop allows us to handle highly complex geometries. For parts with deep recess cavities, blind holes, or internal diameters, we design and fabricate custom copper racks and auxiliary anodes (conforming anodes) that direct the electric current inside the recesses. This ensures a uniform plating thickness and prevents "burning" on outer corners or "skipping" inside holes, satisfying tight tolerances.

Our standard turnaround time for most electroplating orders is 3 to 5 working days, depending on the batch volume, plating specifications, and the complexity of pre-plating cleaning required.

For urgent situations, we offer an Express Plating Service with a turnaround of 24 to 48 hours. Please contact our logistics desk in advance to reserve bath capacity and schedule priority line-down processing.

Yes, we fully support prototype testing, pilot runs, and small-batch engineering samples. We understand that design verification is critical before scaling up to mass production. We work closely with engineering teams to optimize plating specs on initial samples.

To cover the chemistry setup, heating, and quality testing costs for separate plating baths, we maintain a minimum order value (MOV) for small batches. Please discuss your batch size and prototype requirements with our team to receive a tailored estimate.

Yes, we provide a dedicated pick-up and drop-off transportation facility for our customers. For manufacturing units and machine shops located within a 10 km radius of Jamnagar (including GIDC Phase-II, Dared, and Electric Zone), we offer complimentary transportation for standard batches.

For outstation clients or facilities located beyond this radius, we coordinate logistics through trusted commercial freight carriers at cost, or work directly with your preferred transportation services.