---
title: Red Rust | one to ONE Holdings
description: What is red rust? Learn why this common form of iron oxidation weakens steel and can spread corrosion. We also explain how it differs from white rust.
image: https://www.o2oh.com/hubfs/o2Oh_18mm.jpg
---

Perfecting imperfections with one to ONE

# Glossary

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- [H～N](https://www.o2oh.com/glossary?val=h_n)
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# Red Rust

"Red rust" refers to the state in which iron oxidizes upon contact with water and air, causing it to rust red.

Generally, the term "rust" refers to this red rust. On the other hand, rust that forms when zinc oxidizes is white, so it is called "[white rust](https://www.o2oh.com/glossary/white-rust)."

Red rust is a form of corrosion caused by the oxidation of iron, which leads to quality deterioration, such as a reduction in the strength of iron products. Additionally, red rust can adhere to or make close contact with other uncorroded iron parts, becoming a cause of "contact rust," which spreads corrosion, so caution is required.

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