Most of you will be aware of the basic principles behind the workings of a steam locomotive, fire heats water, water...
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What is the dome for on a steam locomotive?Read more -
Can I use a digital power clip with an analogue layout?Read moreThere are many types of power clip available to attach power cables to model railway track, and in the main, they all...
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How can I model fuel or oil stains on track?Read moreOil spills and evidence of oil leaks are a common feature of many railway tracks around engine depots and at the end...
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Should I add ballast to my empty model wagons to prevent them from derailing?Read moreYes, adding ballast to empty model wagons can help to prevent them from derailing. Ballast is typically added to...
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What are bolster wagons used for?Read moreThe term 'Bolster Wagon' refers to a type of railway wagon specifically designed for the transportation of long and...
What is zamak rot (zinc pest)?
Zamak Rot (also known as zinc pest or Mazak rot) is a problem that plagued some early diecast model parts due to impurities in the alloys used.
The impurities have the potential to corrode parts from within, resulting in alloys becoming fragile. The problem affected many chassis and wheels produced between the 1930s and 1970s. Early signs of rot include the appearance of a white powder-like substance followed by bubbling and the eventual cracking or crumbling of the alloy.
Some modellers have had success prolonging the life of affected components by soaking them in vinegar. This method appears to be most effective when rot is caught in the early stages.
Zink rot caused problems for most model manufacturers of the time but has now been mostly eradicated thanks to the use of improved raw materials and better manufacturing techniques, to the extent that genuine cases of zinc rot in the models of today are virtually unheard of.
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