Rust on your Cast Iron

You received your raw cast iron grate with its silver hue and flawless appearance only to walk outside two weeks later to find a grate with orange spots of rust starting to form.  The first thought you have is to return the grates because they must be defective and you didn’t sign up for this abomination. “Why me? Why my grate?”

When exposed to moisture and air, a typical orange-brown hydrated oxide (limonite) forms. There is a natural process that a grate goes through that takes time to achieve the classic dark amber color that makes it beautiful again. The more tightly adhering oxide coating actually protects the grate from further corrosion.

How long will my grates be orange?untreated cast iron rusting

Depending on the climate, it can take anywhere from months to a year. The amount of traffic and weather the grates receive may speed up the process.

As a company we understand that some of you don’t want to wait so we offer the Baked on Oil Finish to get you the desired look without the hassle.  I too want instant gratification and don’t want to wait the allotted time it takes for an ugly duckling become a beautiful swan. With our special Baked on Oil Finish we put the grate through a process that promotes even coloring so when received you have the desired effect you’re looking for.

“Does the rust ruin my grate?”

This is a concern of most people but an unnecessary one, as the rust is and will remain superficial. The structural integrity of a ductile iron component will therefore not be impaired.

“Why not paint my grate?”

Powder coating is a great way to change the look of your grate when trying to achieve the color you desire. Depending on what material your grate is made of and what application it is being used, powder coating is an acceptable option.  Paint is not necessarily a long term option to keep your grating rust free with time paint can wear and crack causing water to get under the paint making it bubble and chip.  Paint is also used to hide defects, blow holes, and will need to be regularly maintained to keep it looking pristine.  Why not be environmentally friendly by letting nature take its course or allow us to give her a helping hand.

There are other materials available that won’t rust and may be better for your application while providing the look and feel that’s perfect for your design.

    • Bronze
    • Aluminum
    • Plastic
    • Stainless or Galvanized Steel
MCKS-IA-Aca-BF Ironage boof grate aca mini channel tds sand channel
MCKS-IA-Aca-BF Ironage boof grate – Acanthus pattern mini channel in TDS sand colored channel

Still not sure whether to embrace the orange or let your grates grow old gracefully? Contact our experienced experts who can help you weigh the options for your project.