316L stainless steel is a type of austenitic stainless steel that contains a lower carbon content compared to 316 and 304 stainless steel, which makes it more resistant to corrosion and rust in harsh environments, including swimming pools. Here are some additional features that contribute to the anti-corrosion and rust function of 316L stainless steel:

High resistance to corrosion: 316L stainless steel contains molybdenum, which makes it highly resistant to corrosion by seawater, chlorides, and other harsh chemicals commonly found in swimming pools.

Passivation: Passivation is a process where a thin protective oxide layer is formed on the surface of the stainless steel to prevent further corrosion. 316L stainless steel has a natural ability to self-passivate, which further enhances its anti-corrosion properties.

Low maintenance: Due to its high resistance to corrosion, 316L stainless steel requires minimal maintenance, which makes it an excellent material choice for pool lights.

Durability: 316L stainless steel is extremely durable and can withstand harsh environments, including exposure to saltwater, chlorides, and other chemicals found in swimming pools.