Special cleaning agent for aluminium equipment

Abstract

The invention relates to a chemical cleaning agent, in particular relating to a special cleaning agent for cleaning aluminium equipment. The invention provides the special leaning agent for the aluminium equipment and a scheme. The cleaning agent can effectively clean various insoluble scales on the aluminium equipment. The cleaning agent comprises the following raw materials by weight percent: 15-25% of HNO3, 3-10% of hydroxyethylidene diphosphonic acid, 1-2% of HF, 0.5-1.5% of JFC, 0.03-0.1% of nonionic polyacrylamide, 0.1-0.5% of corrosion inhibitor L-5 and the balance of water. The agent is mainly composed of organic aicd, a corrosion inhibitor, a cosolvent, a penetrating agent and other mixtures and is specially used for cleaning the aluminium equipment, the pH value of the agent is acidic and metals is not corroded, and a passivation coating is formed on the surface of metal aluminium at the time of cleaning so that cleaning and passivation can be completed by one step.

Description

technical field

[0001] The invention relates to a chemical cleaning agent, in particular to a cleaning agent specially used for cleaning aluminum equipment. technical background

[0002] In daily industrial production, once aluminum equipment is scaled, it will greatly reduce the heat exchange efficiency, reduce the cooling effect, corrode the equipment, shorten the service life of the equipment, and endanger the safety of production. The common types of scale are carbonate scale, sulfate scale, silicate scale, mixed scale, iron oxide scale, oil scale and so on. In order to clean different scales, various strong acids are usually used, but many acids are too corrosive to aluminum. For example, there is no good corrosion inhibitor to alleviate the corrosion of aluminum by hydrochloric acid. Cleaning companies often use aluminum The equipment is washed out. Thoroughly remove the relatively insoluble dirt formed in aluminum equipment, which has always been a major problem in ...