CN101899667A

CN101899667A - Special cleaning agent for aluminium equipment

Info

Publication number: CN101899667A
Application number: CN 201010218008
Authority: CN
Inventors: 金保全
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2010-12-01
Anticipated expiration: 2030-06-28
Also published as: CN101899667B

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

Special cleaning agent for aluminium equipment

Technical field

The present invention relates to a kind of chemical, specifically, relate to a kind of clean-out system of special cleaning aluminium equipment.

Technical background

In the daily industrial production, aluminium equipment will reduce heat exchanger effectiveness greatly in case knot scales, and reduce cooling performance, and etching apparatus shortens service life of equipment, jeopardizes safety in production.The kind of common dirt has carbonate deposit, sulfate scale, silicate scale, mixing incrustation scale, ferric oxide dirt, grease etc.In order to clean different incrustation scales, will select various strong acid for use usually, but a lot of acid is too big to the corrodibility of aluminium, such as, also there is not good inhibiter to alleviate the corrosion of hydrochloric acid at present to aluminium, often there is cleaning company to wash aluminium equipment bad.Remove the dirt than indissoluble that knot is given birth in the aluminium equipment up hill and dale, this is a great problem of puzzlement aluminium equipment treatment of dirt always.

Summary of the invention

Technical purpose of the present invention is to overcome an above difficult problem, and special cleaning agent for aluminium equipment and scheme are provided, and can clean the various indissoluble dirts on the aluminium equipment effectively.

The technical scheme of special cleaning agent for aluminium equipment of the present invention is such: it comprises the HNO of the raw material of following weight ratio: 15-25% ₃, the hydroxy ethylene diphosphonic acid of 3-10%, HF, the 0.5-1.5%JFC of 1-2%, the non-ionic polyacrylamide of 0.03-0.1%, the inhibiter L-5 of 0.1-0.5%, all the other are water.

This product is a light yellow transparent liquid.

Be that starting material of the present invention are explained below:

Nitric acid (HNO ₃): nitric acid can generate soluble product with incrustation scale and corrosion product, and there is passivation the metallic surface.

HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid): can be miscible with water, has good scale effect, acid and alkali-resistance, can form stable complex compound with multiple metal ions such as iron, copper, aluminium zinc, energy dissolution of metals oxide on surface, being the Scale inhibitors and the inhibiter of boiler and switching heat-exchanger, is the dirt dispersion agent of circulating water system.

Hydrofluoric acid: hydrofluoric acid not only can the dissolve silicates dirt, and can quicken a-Fe ₂O ₃And magnetic Fe ₃O ₄Segregation, so be the good clean-out system of boiler mill scale, iron dirt, iron rust.Hydrofluoric acid and Fe ₃O ₄Carry out fluorine one oxygen exchange during contact earlier, that continues carries out F ^-Complexing action.The F that generates by disassociation ^-Ion has a pair of lone electron pair, very easy inserting with Fe ³⁺In the unoccupied orbital for the valence shell of central ion, form the complex compound that O joins key, i.e. iron one iron one sodium aluminum fluoride, thus make the ferric oxide dissolving.

JFC (fatty alcohol-polyoxyethylene ether): osmosis is arranged, and also is to have a fixed hydrophilic and oleophilic group, aligns at the surface energy of solution, and the material that surface tension is significantly descended.

Nonionic PAM (polyacrylamide): be linear polymer, have the effect of flocculation, dispersion, thickening, bonding, film forming, gel, stable colloid with the low ion degree of high-molecular weight.

Inhibiter L-5: be the agent of nitric acid special efficacy special corrosion.

Subject range of the present invention: be primarily aimed at aluminium equipment, device.

Consumption of the present invention: 100% of the container water yield.

Multiple mixture such as the main organic acid of this reagent, inhibiter, solubility promoter, permeate agent is formed, be exclusively used in the cleaning aluminium equipment, medicament pH value is acid, but does not corrode metallic aluminium, can form passive film on the metallic aluminium surface when cleaning, cleaning and one step of passivation are finished.

Using method of the present invention:

Consumption: add medicament stoste according to dirt amount and thickness, hardness situation, perhaps by the on-the-spot scheme that adds of working out of technician.

Add by the recycle pump suction port, constitute circulation.Perhaps spray, also can soak.

According to dirt amount operation 4 to 8 hours, flow velocity was fast, and cleaning speed is also fast, and blowdown fast gets final product with the clean equipment of a large amount of flushing with clean water more then.

Single devices can be soaked or spray Cleaning for High Capacity in this way, treats dirt all after the dissolving, and water washes down and gets final product.

Embodiment

Embodiment 1:

Get the HNO of the raw material 15% of following weight ratio ₃, 10% hydroxy ethylene diphosphonic acid, 2% HF, 1.5%JFC, 0.03% non-ionic polyacrylamide, 0.1% inhibiter L-5, add water to 100% and get final product.

Adopt special cleaning agent for aluminium equipment stoste spray, flushing, intermittently hydro-peening is 3 times, and dirt all cleans up, and has formed the passive film of one deck densification in equipment surface, and the equipment that guaranteed is in does not have the good running status of dirt.

Embodiment 2:

Get the HNO of the raw material 25% of following weight ratio ₃, 3% hydroxy ethylene diphosphonic acid, 1% HF, 0.5%JFC, 0.1% non-ionic polyacrylamide, 0.5% inhibiter L-5, add water to 100% and get final product.

Embodiment 3:

Get the HNO of the raw material 20% of following weight ratio ₃, 5% hydroxy ethylene diphosphonic acid, 1.6% HF, 1% JFC, 0.05% nonionic PAM, 0.3% inhibiter L-5, add water to 100%.

Claims

1. a special cleaning agent for aluminium equipment is characterized in that, it comprises the HNO of the raw material of following weight ratio: 15-25% ₃, the hydroxy ethylene diphosphonic acid of 3-10%, HF, the 0.5-1.5%JFC of 1-2%, the non-ionic polyacrylamide of 0.03-0.1%, the inhibiter L-5 of 0.1-0.5%, all the other are water.