Raytron Technical Review RESEARCH ARTICLE

CCA in Marine Environments: Corrosion Prevention

Gao-Lei Xu¹ *

¹RAYTRON Group Technology Research Center, China

^*Corresponding author

Received: 2025-12 Accepted: 2026-02 Published: 03/2026

DOI: 10.1234/raytron.2026.WP-02-14

1. Introduction

1.1 Marine Environment Challenges

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Figure Fig. 1 Marine Environment Corrosion Mechanism Diagram

2. Corrosion Mechanisms

2.1 Galvanic Corrosion

In CCA: The copper cladding protects the aluminum core, only becoming an issue when the cladding is damaged.

2.2 Pitting Corrosion

Aluminum is susceptible to pitting corrosion in chloride environments.

3. Environment Classification

4. Protection Strategies

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Figure Fig. 2 Protection Measures Effectiveness Comparison

5. Application Guidelines

6. Conclusion

CCA requires appropriate protection measures in marine environments, with the copper cladding providing fundamental protection.

Figures

Marine Environment Corrosion Mechanism Diagram

Fig. 1 Marine Environment Corrosion Mechanism Diagram

Protection Measures Effect Comparison Diagram

Fig. 2 Protection Measures Effectiveness Comparison

Tables

Table 1 Marine Environment Challenges

Factor	Impact
Salt Spray	Accelerated Corrosion
WetDegree	Penetration
TemperatureCycle	Material Stress
UltravioletWireExposed	InsulationDegradation

Table 2 CCA Marine Application Suitability

Application	CCA Suitability
Deck under	Good(Required Protection)
Deck on	RequiredSpecial
Exposed	Not Recommended

Table 3 Galvanic Corrosion Risk

Metal Pair	Potential Diff	Risk
Cu/Al	0.7V	High
Cu/Steel	0.3V	in etc.

Table 4 Protection Strategies

Strategy	Method	Effectiveness
Insulation Protection	Appropriate Insulation	High
Sealed	TerminalSealed	High
Plating	PlatedTin/PlatedNickel	in etc.
AvoidExposed	Optimal

References

ASTM International ASTM B117: Salt Spray Testing ASTM (2021)
ISO ISO 9227: Corrosion Tests ISO (2022)

Authoritative References

ASTM International IEC (International Electrotechnical Commission) ISO (International Organization for Standardization) SAE International IEEE

Gaolei Xu

Senior Materials Scientist

Credentials & Honors

• CTO, Raytron Group
• Zhejiang Provincial High-level Talent Special Support Program - Young Talent
• Shaoxing "Technology Vice President"
• Shaoxing Science and Technology Commissioner
• Member of National Technical Committee 243 on Heavy Metals (SAC/TC 243/SC2)

National Standards (Lead Author) View Official

GB/T 27671-2011 - Copper Profiles for Electrical Conductors
YS/T 1043-2015 - Silver-bearing Oxygen-free Copper Strip for Motor Commutators
YS/T 974-2014 - Copper and Copper Alloy Strip for Composite Contact Materials
YS/T 1082-2015 - Copper Strip for Lamp Lead Stents

Patents (Inventor) Search Patents

CN104959396A - Production Process of Copper Strip for Composite Contact Materials
CN106077125A - Production Process of Copper Profile for Magnetic Pole Coils
CN201410710206 - Conductive Material for High-speed Railway Traction Motors and Production Method
CN201310719717 - Method for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
CN201310720126 - Device for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
CN201310376884 - Five-in-one Copper Strip Edge Treatment Equipment for Transformers
CN201420184755 - Continuous Extrusion Die Flow Promotion Device
CN201320761640 - Continuous Extrusion Waste Cleaning Device

Areas of Expertise

Copper-Clad Aluminum (CCA) Technology Copper-Clad Steel (CCS) Manufacturing Bimetallic Composite Materials PV Ribbon for Solar Cells Battery Tab Materials for EV Applications Continuous Extrusion Technology

Selected Publications

• Research and Application of Rolling Method for Manufacturing Metal Laminated Composites, Aluminum Processing Journal, 2008
• Annealing Process Research of Copper-Aluminum Composite Strip
• Research on Preparation Process of Copper/Aluminum Composite Strip for Cables
• Interface Microstructure Evolution of Rolled Copper/Aluminum Composite Strip During Annealing

Mr. Xu Gaolei is a distinguished expert in non-ferrous metal processing with over 15 years of experience. He is recognized as a Young Talent under the Zhejiang Provincial High-level Talent Special Support Program. He leads R&D initiatives in bimetallic composite technologies and has contributed significantly to the standardization of copper and bimetallic materials in China.

Click standard/patent codes to view official documents