![]() ![]() Exposure to sulfur dioxide and carbon dioxide will also hasten the corrosive process. If salt is present, for example in seawater, the corrosion will be more rapid. ![]() Although iron and steel structures seem solid to the eye, water molecules are able to penetrate microscopic gaps in the metal. The main catalyst for rust to occur is water. Whenever you have iron, water, and oxygen together, you get rust. Rust can affect iron and its alloys, including steel. Rust is the orange-brown discoloration that builds up on metal. It occurs when iron combines with the oxygen in the air causing it to corrode. In order to understand which metals do not rust, we need to address what the terms “rust” and “corrosion” mean. This rusting process proves costly in daily life - to the tune of about 1 percent of the value of the world’s economy”, reports Seattle PI which is a metro daily newspaper in Seattle. Despite its strength, iron is prone to corrosion in the presence of water and oxygen. “The element iron is the most abundant transition metal on Earth and has been used by mankind for over 5,000 years. ![]()
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