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Corrosion-Prone Environment Aluminum Alloy Wire

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Product Description

Aluminum filler metals specifically formulated for joining materials exposed to severe corrosive conditions, most commonly marine or high-humidity industrial environments. This requires the use of Aluminum-Magnesium (5XXX) alloys like ER5183, ER5356, and ER5556, which form a tough, self-healing oxide layer that is highly resistant to saltwater and chemical attack. The wire must also have controlled impurity levels (Cu,Fe) to prevent galvanic corrosion initiation sites within the weld deposit, ensuring the weld joint maintains corrosion integrity over the component's lifespan.

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20+ Years Experience

Over two decades of aluminum alloy wire production expertise

International Certifications

DB, CE, ABS, DNV, CCS and other authoritative certifications

200MT Monthly Capacity

Large-scale production with consistent quality

Global Export

Exporting to over 30 countries worldwide

Introduction

Corrosion is the single greatest threat to aluminum structures in coastal and chemical environments. Using the wrong filler metal can create a cathodic or anodic region in the weld bead, accelerating localized corrosive attack and leading to premature structural failure. Our corrosion-resistant wire portfolio focuses exclusively on high-Magnesium content alloys that achieve a corrosion potential (measured in the Galvanic Series) that is closely matched to the corrosion-resistant base metals they join. This material is your first line of defense against pitting, crevice, and stress corrosion cracking (SCC).

Specification

Alloy FocusER5183, ER5356, ER5556 (High Mg content)
Corrosion Type TargetedPitting, Stress Corrosion Cracking (SCC) in saltwater
Key PropertyGalvanic Potential Match to Base Metal, Tough Oxide Film Formation
Impurity LimitStrict limits on Cu(<0.10%) and Fe to prevent galvanic sites
Test StandardASTM G44 or G47 Salt Spray/Alternate Immersion Testing

Applications and Solutions

  • Marine and Shipbuilding: Welding hulls, decks, piping, and fixtures exposed to saltwater and spray (often 5083 or 5052 base metals).

  • Offshore Platforms: Fabrication of walkways, railings, non-slip surfaces, and accommodation modules in splash zones.

  • Chemical and Petrochemical Plants: Welding tanks and piping exposed to acidic or alkaline environments.

  • Coastal Infrastructure: Fabrication of aluminum components for bridges, docks, and coastal rail systems.

FAQ

  • Q: Can ER4043 be used in saltwater environments?A: No. ER4043 (Al-Si) alloys are highly susceptible to pitting corrosion in saltwater due to the galvanic potential difference between the Al-Si eutectic phases and the aluminum matrix. Always use 5XXX alloys for marine exposure.
  • Q: Which 5XXX filler offers the highest corrosion resistance?A: ER5356 and ER5183 offer excellent resistance. ER5183 generally provides slightly higher strength and is often preferred for welding high-strength base metals like 5083.
  • Q: What is the risk of SCC with high Mg alloys?A: High Mg alloys (like ER5183 and ER5556) can become susceptible to SCC if subjected to prolonged temperatures above 65∘C. For high-temperature corrosion service, specialized low-Mg alloys are needed.

Advantages and Core Features

  • Saltwater Immunity: High Mg content provides superior resistance to chloride-induced pitting and crevice corrosion compared to 4XXX alloys.

  • Structural Strength Retention: 5XXX fillers provide higher weld strength than pure corrosion-resistant alloys, combining structural integrity with environmental protection.

  • Minimized SCC Risk: For ER5183 and ER5556 when used correctly, the Mg level is balanced to resist Stress Corrosion Cracking at service temperatures.

  • Excellent Toughness: The resulting weld joint maintains high ductility and toughness, important for marine structures subject to dynamic loading.

Material Selection Guide

For welding structures in corrosion-prone environments, select a 5XXX series filler metal. Match the filler strength and Mg content to the base metal: ER5356 for general use and ER5183 for high-strength 5083 or 5456 base metals. Verify that the service temperature does not exceed 65∘C to avoid the risk of SCC.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Corrosion-Prone Environment Aluminum Alloy Wire Manufacturers and Wholesale Corrosion-Prone Environment Aluminum Alloy Wire OEM/ODM Suppliers. We are located in the industrial zone of Puyang Town, Xiaoshan District, Hangzhou, Zhejiang Province. It is a high-technology enterprise specializing in the research, development and manufacturing of high-performance. The company has more than 20 years of aluminum alloy wire production experience, with international advanced manufacturing equipment, complete testing equipment,stable production process and strict quality control system.
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