Under normal use and proper maintenance, aluminum alloy hand chain hoists are not prone to rusting, but they are not completely immune to it. Here is a detailed analysis: 1. The anti-rust principle of aluminum alloy Aluminum alloy inherently possesses the property of antioxidation and corrosion resistance because its surface naturally forms a layer of aluminum oxide film (Al₂O₃). This film can effectively isolate moisture and oxygen, preventing further corrosion of the internal metal. Therefore, in dry, chemically non-corrosive environments, aluminum alloy hand chain hoists indeed have better rust resistance than ordinary steel hoists. 2. Possible situations that may lead to rusting Although aluminum alloy is resistant to corrosion, the following situations may still cause problems: Surface treatment damage: If the oxidation layer on the surface of the aluminum alloy is scratched or worn by hard objects, the exposed metal may oxidize locally (resulting in white spots or dark spots). Moisture/salt fog environment: Long-term exposure to humid, acid rain, seawater salt fog, etc., may accelerate corrosion (especially for low-quality aluminum alloys or those with more impurities). 3. Anti-rust properties of key components The load-bearing parts of the hand chain hoist (such as chains, hooks) are usually made of alloy high-strength steel and undergo galvanizing or other anti-rust treatments. These steel components may still rust in a humid environment and require attention to maintenance.