Corrosion is a significant concern for yacht owners, as it can compromise both the aesthetic appeal and structural integrity of a vessel. Whether your yacht is made of steel, aluminium, or features stainless steel components, understanding the causes of corrosion and implementing effective treatment strategies is essential for long-term protection.
At Absolute Boat Care, we specialise in yacht finishing solutions designed to combat the effects of corrosion and preserve your yacht’s pristine condition. In this blog, we’ll explore the types of corrosion, their causes, and the best treatment and prevention methods.
Understanding the Different Types of Yacht Corrosion
1. Galvanic Corrosion
Galvanic corrosion occurs when two different metals come into contact in the presence of an electrolyte (such as seawater). One metal becomes the anode and corrodes faster, while the other (the cathode) remains largely unaffected.
Common examples:
• Aluminium hulls with stainless steel fittings
• Propellers and shafts made from different metals
2. Pitting Corrosion
Pitting corrosion is a localised form of attack that creates small holes in metal surfaces. It is particularly common in stainless steel components exposed to seawater, especially if oxygen levels are low and chlorides (salts) are present.
Common examples:
• Stainless steel railings and fittings
• Underwater hull components
3. Crevice Corrosion
This occurs in areas where stagnant water and lack of oxygen create a corrosive environment. It’s commonly found in tight spaces like under gaskets, bolts, and flanges.
Common examples:
• Seams between metal plates
• Fasteners and joins in deck fittings
4. Electrolytic Corrosion (Stray Current Corrosion)
This is caused by stray electrical currents in the water, often from faulty wiring or poorly installed electrical components. It accelerates metal degradation and can cause serious structural damage.
Common examples:
• Propellers and shafts
• Hull fittings near electrical sources
How to Treat Yacht Corrosion on Your Yacht
1. Identifying the Problem
Before any treatment can begin, it’s crucial to inspect the yacht thoroughly. This includes:
• Checking for visible corrosion on metal surfaces
• Inspecting underwater components during haul-outs
• Using electronic corrosion meters for accurate readings
2. Surface Preparation
Proper surface preparation is key to treating corrosion effectively. The process typically involves:
• Cleaning – Removing salt, dirt, and contaminants with freshwater and specialised marine cleaners
• Abrasive Blasting – For severe corrosion, sandblasting or soda blasting may be necessary to remove rust and oxidation
• Sanding & Grinding – Smoothing out affected areas to prepare for coatings
3. Applying Protective Coatings
At Absolute Boat Care, we use high-performance primers and coatings to protect yachts against corrosion. These include:
• Epoxy Primers – Providing a strong barrier between metal surfaces and the marine environment
• Anti-Corrosive Paints – Designed for long-lasting protection on hulls and metal components
• Passivation for Stainless Steel – Using chemical treatments to reinforce the natural protective oxide layer on stainless steel
4. Anode Replacement
Sacrificial anodes (usually made of zinc, aluminium, or magnesium) are essential for protecting metal components from galvanic corrosion. Regular checks and replacements help prevent excessive metal loss in key areas.
Preventing Future Yacht Corrosion
Regular Maintenance & Inspections
Routine inspections, particularly of underwater fittings and metal components, help catch early signs of corrosion before they become costly issues.
Electrical System Checks
Ensuring proper insulation and grounding of electrical systems can prevent stray current corrosion. If necessary, installing isolating transformers can help regulate electrical flow.
Proper Cleaning & Care
Washing down your yacht with freshwater after every trip helps remove salt and prevents corrosion build-up. Using marine-grade lubricants and protective sprays also extends the life of metal parts.
Professional Yacht Finishing Services
At Absolute Boat Care, we offer expert yacht finishing solutions, including anti-corrosion treatments, protective coatings, and premium surface restoration. Our skilled team ensures that your yacht remains in top condition, safeguarded against the harsh marine environment.
Protect Your Investment with Absolute Boat Care
Corrosion can be a persistent challenge, but with the right treatments and preventative measures, you can keep your yacht in peak condition for years to come. Whether you need protective coatings, anode replacements, or expert advice, Absolute Boat Care is here to help.
Get in touch with us today to discuss your yacht maintenance needs and let us ensure your vessel remains corrosion-free and looking its best.
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