Sealed galvanization for anchor chain connecting parts

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Sealed galvanization for anchor chain connecting parts

Product catalog summary

Sealed Galvanization for Anchor Chain Connecting Parts

Achieved Standards:

UNI ISO 2081
UNI ISO 4520
ASTM B633
DIN 50979

Overview:

The sealed galvanization process is an enhanced surface treatment specifically for anchor chain connecting parts, such as kenter shackles. This process is conducted in Italy and involves two main steps: passivation and sealing.

Process Details:

Passivation: This initial step involves applying a very thin, stable layer of zinc salts, including elements like chrome, cobalt, and silicon. This layer stabilizes the zinc against corrosive agents.
Sealing: The second step involves applying a thin, usually organic film that chemically bonds with the passivation layer, providing additional protection to the zinc-passivation connection.

Comparison with Standard Chinese Galvanization:

The standard Chinese galvanization process is electrolytic and performed only when kenter shackles are assembled. This method does not fully galvanize the internal parts, leading to quicker rusting. In contrast, the Italian sealed galvanization is applied when kenter shackles are disassembled, ensuring comprehensive protection.

Catalog excerpts

Sealed galvanization for anchor chain connecting parts-1

mooring and towing marine equipment The sealed galvanization is an additional surface treatment improvement carried out in Italy ( not in China) and it's composed by 2 different process: The first one called "passivation" it's made by a very thin " stable layer" zinc salts as ( chrome, cobalt, Silicon) and it stabilizes the zinc on the corrosive agents. The second it's the sealing, made by a thin film, usually organic, chemically tied with the passivation and it further protects the zinc-passivation connection This treatment usually carried out for kenter shackles is done in Italy when kenter shackles are disassemble as the standard Chinese galvanization is only electrolytic and done when kenters are assembled ONLY. The inside parts are not galvanized completely and this is one of the Reason why usually kenters start to get rusted soon. [email protected] - www.posidonia.com

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