Zinc Electroplating
High-Performance Corrosion Protection by Petrotube Zinc electroplating is a highly effective method for protecting steel fasteners from corrosion by acting as both a barrier and sacrificial coating.At Petrotube, we ensure superior-quality zinc plating that enhances durability while maintaining the structural integrity of fasteners.
Why Choose Zinc Electroplating?✔ Corrosion Resistance – Zinc plating provides long-term protection by corroding first, shielding the steel substrate.✔ Extended Lifespan – Zinc corrodes 10 times slower than steel, offering enhanced durability.✔ Aesthetic Finish – Delivers a smooth, shiny, and drip-free surface, ideal for industrial and commercial applications.✔ Cost-Effective Solution – A thinner coating that does not interfere with fastener threads while reducing production costs. Zinc Electroplating Process at Petrotube1. Surface PreparationFasteners undergo a thorough cleaning process to ensure optimal adhesion of the zinc coating: Alkaline Cleaning – Removes oil, grease, and contaminants. Acid Pickling – Eliminates rust and surface scales for a clean, reactive surface. 2. Electroplating ProcessThe electro-deposition method is used to coat the fasteners with a uniform layer of zinc:✔ Chemical Bath Immersion – Fasteners are placed in a bath containing dissolved zinc.✔ Direct Current Application – Zinc from the anode dissolves and deposits onto the fastener surface.✔ Coating Thickness Control – Determined by plating time, electrical current, and bath composition. 3. Hydrogen Embrittlement & De-Embrittlement Baking Hydrogen embrittlement occurs when atomic hydrogen penetrates the fastener structure, leading to potential failures. De-embrittlement baking is performed immediately after plating in our fully automated processing line with asynchronized hydrogen de-embrittlement furnace and passivation line, ensuring maximum structural integrity.Additional Corrosion Protection 1. Passivation Treatment✔ A protective metal oxide layer is applied to prevent oxidation and extend the life of zinccoated fasteners.✔ Enhances both corrosion resistance and appearance. 2. Chromate Conversion CoatingsFor enhanced durability in moderate to severe environments, chromate coatings are applied:✔ Trivalent Chromates (Clear, Blue-Bright, A/B Designation) – Used for Grade 5 / Class 8.8 fasteners.✔ Yellow Chromate (C3+ Hexavalent-Free) – Recommended for Grade 8 / Class 10.9 fasteners. Petrotube – Quality You Can TrustAt Petrotube, we ensure that all fasteners meet ISO 9001 and TS 16949 standards. Our full traceability system guarantees compliance with industry specifications, offering high-quality plating solutions for your industrial needs. Contact Us for Premium Zinc-Plated Fasteners! Looking for high-performance zinc electroplating solutions? Get in touch with Petrotube today to discuss your requirements!