Wet corrosion of CuNiFer pipe in seawater

Thread starter Ters
Start date Feb 15, 2024
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Corrosion Material

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SUMMARY

The discussion centers on the wet corrosion of CuNiFer alloy pipes used in seawater cooling systems. These pipes are electrically insulated from nearby metals to prevent galvanic corrosion, and they are additionally protected by zinc sacrificial anodes. Despite their known corrosion resistance, concerns about wet corrosion in CuNiFer pipes persist, prompting inquiries into the mechanisms and protective measures against this type of corrosion. A relevant research paper on the subject is provided for further reading.

PREREQUISITES

Understanding of CuNiFer alloy properties
Knowledge of galvanic corrosion principles
Familiarity with sacrificial anode protection methods
Basic concepts of seawater corrosion mechanisms

NEXT STEPS

Read the paper on CuNiFer wet corrosion available at the provided link
Research the effectiveness of zinc sacrificial anodes in marine environments
Explore the electrochemical principles behind galvanic corrosion
Investigate alternative corrosion-resistant materials for seawater applications

USEFUL FOR

Marine engineers, corrosion specialists, and professionals involved in the maintenance of seawater cooling systems will benefit from this discussion.

Feb 15, 2024

Ters

TL;DR: Wet corrosion CuNiFer pipes?

This CuNiFer alloy pipe is used in a seawater cooling system and is electrical insulted with nearby metals; this prevents galvanic corrosion to occur since there is no contact with other metals. I've seen multiple sources that say CuNiFer is very corrosion resistance.

The pipe is still protected with a zinc sacrificial anode (red painted bolt). I've found some about wet corrosion in CuNiFer pipes but i'm not sure if this is true. What is the purpose of this protection, against what kind of corrosion is this and what is the driving force of this corrosion? Can you give me the corresponding source?

The paper about CuNiFer wet corrosion: https://www.google.com/url?sa=t&rct...usg=AOvVaw1layEHHCPnsWGdlSPHU-gF&opi=89978449