Rubber hose aging leads to unnecessary economic losses. To cut these losses, one effective method is to slow down aging—this extends the rubber hose’s service life. But to slow aging, you first need to understand the key factors that cause it. Below are the most common causes of rubber hose aging:
1. Oxidation (Oxygen Exposure)
Oxidation is one of the biggest drivers of rubber hose aging. Oxygen in the air reacts with specific substances in the rubber hose’s material. This reaction changes the rubber’s chemical structure. Over time, this makes the rubber brittle, less flexible, and more prone to cracking. Even small amounts of oxygen can speed up this process, especially in rubber hoses used outdoors or in well-ventilated areas.
2. High Temperature
Temperature plays a major role in accelerating rubber hose aging. First, higher temperatures speed up the oxidation reaction I mentioned earlier. The faster this reaction, the quicker the rubber hose ages. Second, if the temperature reaches a certain threshold, the rubber itself starts to break down. This process (called thermal cracking) damages the rubber’s molecular bonds. It weakens the hose, reduces its pressure resistance, and shortens its lifespan—this is especially risky for high-temperature rubber hoses used in engines or industrial machinery.
3. Light (Especially Ultraviolet Rays)
Light carries energy, and shorter light waves have more energy. Among all light types, ultraviolet (UV) rays are the most harmful to rubber hoses. UV rays penetrate the rubber’s surface and break down its molecules. When the rubber absorbs this light energy, it creates free radicals. These free radicals trigger and speed up the oxidation chain reaction—making the rubber hose age faster. Additionally, light (like sunlight) also heats up the hose, which adds to the aging effect.