Zinc alloy strip sacrificial anode | Anti-corrosion zinc strip

Strip Zinc Alloy Sacrificial Anode | Anti-Corrosion Zinc Strip

Strip Zinc Alloy Sacrificial Anode is an electrochemical protection device used to safeguard metal structures from corrosion. It primarily functions by establishing a galvanic cell reaction between the metal structure and an electrolyte (such as seawater or soil), where the zinc alloy acts as the anode and is consumed, thereby protecting the metal structure serving as the cathode from corrosion. This sacrificial anode design aims to provide an economical and effective method of corrosion protection, especially in marine engineering and underground structures requiring long-term safeguarding.

Strip zinc alloy sacrificial anodes offer the following features and advantages:

• Diverse Specifications and Sizes: Depending on various application needs, strip zinc alloy sacrificial anodes are available in multiple specifications and sizes, such as 31.75*25.4, 15.88*22.23, 12.7*14.28, 8.73*11.91, etc.¹.
• Excellent Electrochemical Performance: Zinc alloy sacrificial anodes demonstrate strong electrochemical performance in seawater and other media containing chloride ions, with high self-regulating capabilities. Their electrode potential is -1.10V CSE, and the potential difference with steel is approximately 0.25V. This relatively small potential difference makes zinc anodes suitable for use in soils with resistivity less than 15 Ω·m or in seawater².
• Long Design Life: Zinc alloy sacrificial anodes have a long design life, providing durable protection.
• Easy Installation: Due to their strip form, strip zinc alloy sacrificial anodes can be laid alongside pipelines or wrapped around them, making the installation process relatively straightforward³.

Additionally, the application of strip zinc alloy sacrificial anodes is subject to certain limitations. For example, in environments with temperatures above 49°C, intergranular corrosion may occur, causing the electrode potential of the zinc anode to become more positive and leading to a polarity reversal with steel. In such cases, the zinc anode would corrode instead of protecting the steel. Therefore, it is generally recommended for use in environments with temperatures below 49°C.