Marine corrosion refers to the gradual degradation of materials, especially metals, caused by exposure to the highly salt-concentrated marine environment. This process combines physical wear from factors like water flow and impact with chemical and metal reactions driven by saltwater and oxygen. Physical corrosion, like erosion and cavitation, occurs primarily from fast-flowing water, sand surfaces, and high-speed propeller rotation. For boats constantly experiencing this reaction, preventative measures are necessary to ensure your boat stays in the best condition.

What Causes Marine Corrosion?

Saltwater exposure

Saltwater speeds up the corrosion process due to its high salt content, which acts as an electrolyte, accelerating the electrochemical reactions that break down metals. Steel, aluminium, and brass are particularly susceptible to saltwater corrosion. For instance, steel corrodes very quickly in salt water, leading to rust that weakens its structure, resulting in costly repairs. Brass fittings, however, may leak zinc when exposed to saltwater, which can make the metal brittle and weak.

Galvanic corrosion

When dissimilar metals come into contact in a saltwater environment, galvanic corrosion often occurs. This happens because metals have different electrical potentials. When connected, one metal (the anode) corrodes faster while the other (the cathode) is protected. This is a common issue on boats when metals like steel, aluminium, and brass are in contact, particularly around the hull, propeller, and fittings. Corrosion inhibitors or sacrificial anodes are essential when working with two dissimilar metals to prevent galvanic corrosion and extend the lifespan of your boat.

Environmental factors

Moisture in the air, pollutants, and temperature changes can all accelerate marine corrosion. High humidity increases moisture levels, intensifying corrosion. Pollutants, such as sulphur compounds, combine with moisture to form acids that corrode metal surfaces. Temperature fluctuations cause materials to expand and contract, weakening protective coatings and allowing corrosive substances to inflict additional damage. Boats in coastal areas, where high humidity and pollutants are prevalent, are particularly vulnerable, making regular maintenance and prevention essential.

The areas most vulnerable to corrosion include:

Engine

Corrosion can occur when saltwater enters cooling systems or internal parts, weakening the elements and causing electrical and structure failure or reduced efficiency.

Hull

A metal hull, especially those made from steel or aluminium, is vulnerable to rusting, pitting, and bacterial corrosion, which can weaken the boat’s structure over time. Being the most exposed part to saltwater, it is typically the first area to experience corrosion.

Fastenings

Metal screws, bolts, and fittings are exposed to constant moisture, leading to corrosion that can compromise the boat’s overall integrity.

Propeller

The constant movement in saltwater can make propellers vulnerable to erosion and pitting corrosion, which affects their performance and leads to material degradation.

Electrical Systems

Exposure to saltwater and moisture can corrode wiring, connections, and components, leading to electrical failures and safety hazards.

Although many boats are constructed with corrosion-resistant materials like stainless steel or treated aluminium, these materials are not entirely immune to the effects of saltwater and the harsh conditions of marine environments. Over time, constant exposure to salt, moisture, and temperature fluctuations can still cause wear and degradation. Proper corrosion protection is necessary to maintain the boat’s integrity and ensure a long lifespan.

Why Choose MGX Marine Lubricant for Corrosion Prevention?

MGX Marine Lubricant features an eco-friendly formula that is safe for marine environments. It contains non-carcinogenic materials and is silicone-free, making it non-toxic to humans and marine life. Environmentally conscious boat owners can trust that MGX Marine Lubricant is the ideal choice for sustainable protection.

MGX Lubricant forms a long-lasting protective layer on metal surfaces, shielding against saltwater, humidity, and environmental damage that leads to marine corrosion. The formula is created to prevent corrosion, guard against galling between dissimilar materials and protect wiring and connectors with non-conductive properties up to 70kV. It is ideal for safeguarding key areas of boats, such as:

• Inboards
• Outboards
• Electronics
• Cables
• Engine mounts
• Pumps
• Crevices
• Canopy frames

Hydrophobic properties

The hydrophobic properties of MGX Lubricant play a crucial role in reducing corrosion. It penetrates deep into metal surfaces, forming a hermetic seal that repels moisture and protects sensitive communication equipment. This barrier effectively controls corrosion and minimises damage caused by environmental exposure.

Multi-purpose use

MGX Marine Grade Lubricant is highly versatile and suitable for various marine industry uses, including boat elements such as hinges, locks, winches, outboard motors, and electrical components. Its advanced formula protects against rust in electrical systems — ideal for boat owners with wiring exposed to the elements — and reduces friction and wear on moving parts. By creating a protective layer, MGX Lubricant minimises corrosion rate while enhancing the smooth operation of mechanical components, ensuring long-lasting durability and performance in harsh marine conditions.

Superior lubrication

MGX Lubricant features advanced lubrication properties that offer cathodic protection for boat moving parts. Its formula provides a high-performance, long-lasting film that reduces friction and wear, ensuring smooth operation of components like chains, cables, linkages, shackles and bearings. This lubrication extends the life of these critical parts, enhancing their durability and performance.

Savings

These preventive measures not only extend the lifespan of your marine vessels but also enhance cost efficiency. Investing in MGX Marine Grade Lubricant is a small price to pay compared to the potential costs of significant damage caused by marine corrosion down the track.

Why MGX Lubricant Is the Best Choice for Protecting Your Boat 

Heat and UV-resistant

MGX Lubricant offers exceptional heat and UV resistance, maintaining its protective qualities even in extreme temperatures and harsh Australian UV rays. Its formula remains effective across diverse boating environments, ensuring reliable lubrication and corrosion protection regardless of varying conditions. This resilience makes it ideal for harsh marine applications and fluctuating temperature ranges.

Easy to apply

MGX Lubricant is easy to apply, simplifying maintenance for boat owners. Whether you spray it on, brush it, or wipe it, the application process is straightforward and efficient. This ease of use saves time and effort, making it a convenient choice for keeping boat components in good condition and maintain cost efficiency.

Non-Staining

MGX Lubricant is non-staining, ensuring it won’t leave unsightly residue or damage boat surfaces. This keeps your boat looking clean and preserves its aesthetic appeal.

How to Apply MGX Marine Lubricant

MGX Marine Lubricant should be applied to dry, clean surfaces free of salt deposits, dirt, or existing corrosion. Please note that it does not rectify already-corroded surfaces.

Shake the can or spray well to ensure proper mixing, especially in colder climates. Depending on the surface area, apply the lubricant using a spray, brush, or roller, whichever is most efficient for you. Allow approximately one hour for the lubricant to set before exposing the surface to water for maximum protection. For the best results, apply before each use, adjusting frequency based on vessel usage. Always read the instructions and safety guidelines before application. Handle with care, as this product is flammable.

How does MGX differ from Traditional Anti-Corrosion Solutions?

MGX Lubricant is an outstanding eco-friendly alternative to traditional anti-corrosion solutions and epoxy coatings, such as grease and oil-based products. Unlike these options, MGX Lubricant is biodegradable, reducing environmental impact and minimising harm to marine life and ecosystems.

While grease and oil-based products offer good lubrication, they attract dirt and debris, becoming less effective in harsh conditions. These solutions tend to wash off in extreme heat or prolonged saltwater exposure and can cause build-up and maintenance issues over time. This means you have to reapply them more often, increasing costs for adequate corrosion control.

On the other hand, MGX Lubricant provides superior protection, is longer-lasting, and supports environmental sustainability, making it the best choice for marine corrosion prevention.

Protect your boat from corrosion with MGX Marine Grade Lubricant

Preventive and maintenance measures are essential to combat marine corrosion, prolong your boat’s lifespan, and ensure peak performance. MGX Lubricant delivers exceptional protection and lubrication, protecting critical components from damage. Its biodegradable formula also minimises environmental impact, making it a sustainable choice.

Find a stockist for MGX Marine Grade Lubricant and experience the difference it can make in preventing marine corrosion today.