The invention relates to a detergent, in particular to a neutral
rust removing detergent. The
rust removing detergent comprises the following components in percentage by weight: 0.8-68.0 percent of acidic agent, 0.5-19.5 percent of chelating agent, 0.5-25 percent of alkaline substance and the balance of water. The
rust removing detergent has the beneficial effects that (1) rust is removed or red rust is prevented form being produced in a throw-in, spray or sink mode, a non-dynamic film (Passivity Layer) is protected, iron rust or scales are not produced on various types of drainage pipes or
water tanks and the like when the rust removing detergent is used in facilities using water such as a boiler, a
heat exchanger, a circulating cooler and a
water supply pipe, and a clean state is kept for a long time, (2) the detergent is neutral, the
metal drainage
pipe can be effectively protected, a quick, safe and comfortable
working environment is provided, the health of operation personnel is protected, the
pollution to
water quality and the environment is more effectively reduced, and a better effect is achieved, and (3) the detergent is quick in rust removing, the rust can be completely removed in one hour, and the non-dynamic thin film can be protected.