How can Bright Zinc plated Steel Shelves go rusty in a Fridge?

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SUMMARY

Bright Zinc plated steel shelves can develop rust even in cold storage conditions, such as 0-1°C, due to the failure of the zinc plating. Over a six-month period, the zinc coating may flake off, exposing the underlying steel to moisture. This phenomenon is likely caused by differing rates of thermal expansion and contraction between the zinc and steel, leading to cracks in the plating that allow moisture ingress and subsequent rust formation.

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  • Understanding of corrosion processes in metals
  • Knowledge of zinc plating and its protective properties
  • Familiarity with thermal expansion principles
  • Basic concepts of moisture control in storage environments
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  • Research the effects of temperature fluctuations on metal coatings
  • Learn about corrosion prevention techniques for steel
  • Investigate alternative protective coatings for metal shelves
  • Explore moisture control methods in refrigeration systems
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Manufacturers, engineers, and maintenance personnel involved in the design and storage of metal shelving systems, as well as anyone interested in preventing rust in cold storage environments.

Jimbob86
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Hi,

I have some Bright Zinc plated shelves which are currently being stored at 0-1'c. Over a period of 6 months they have become extremely rusty. How has this happened?

Please help...
 
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Good question, though I don't have an answer. I have seen the same type of shelves do this, with the zinc plating flaking-off.

My guess, is that there are different rates of expansion/contraction between the two metals, causing separation and cracks in the zinc plating, allowing moisture to enter and cause rusting.
But again, I don't know for sure.
 

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