CN1070957A

CN1070957A - Safety pickle

Info

Publication number: CN1070957A
Application number: CN 92109957
Authority: CN
Inventors: 王光宇
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-29
Filing date: 1992-09-29
Publication date: 1993-04-14

Abstract

A kind of safety pickle, be made up of butyric acid, propionic acid, xitix, formic acid, acetic acid and water, raw materials used weight percent is butyric acid 1-5%, propionic acid 1-5%, xitix 0.1-1%, formic acid 5-20%, acetic acid 5-20%, water 49-87.9%.Characteristics are that the dissolving power to incrustation scale is not less than hydrochloric acid, can eliminate the pollution to environment, have the dual-use function of descaling and derusting concurrently.

Description

Safety pickle

The present invention relates to a kind of industrial water equipment and remove the mild safety pickle of incrustation scale.

At present, industrial water equipment is as the heating boiler of fixedly boiler (low pressure steam boiler, hot-water heating boiler), steam locomotive boiler, passenger vehicle railway carriage, the side cooler of air compressor machine, the water cooler of engine generator set, and the water cooler of petrochemical enterprise etc., after knot scales, often adopt strong inorganic acid coupling restrainers such as hydrochloric acid, nitric acid, sulfuric acid to carry out eccysis.Cause three big strong acid all are very strong to the dissolving power of incrustation scale and steel, therefore in the pickling descaling process, Metal Protection is relied on the corrosion inhibiting ability of restrainer fully, up to the present, the domestic and international restrainer of generation does not still have corrosion inhibition rate and is 100% product.So it is inevitable being suffered the injury of acid solution by the equipment of pickling in the process of pickling.

The safety pickle that the purpose of this invention is to provide a kind of gentleness to alleviate in the scale removal process corrosion of metal, is eliminated the pollution to environment, has the dual-use function of descaling and derusting concurrently.

The object of the present invention is achieved like this: this pickle solution is made up of butyric acid, propionic acid, xitix, formic acid, acetic acid and water, and raw materials used weight percent is butyric acid 1-5%, propionic acid 1-5%, xitix 0.1-1%, formic acid 5-20%, acetic acid 5-20%, water 49-87.9%.

Because the present invention is raw materials used all to be that poisonous material is formulated; wherein butyric acid is the food perfuming agent; propionic acid is the protective material of cereal and feed; the aqueous solution of acetic acid is the indispensable condiment of people; xitix is one of main VITAMIN of human body; formic acid is edible, because people have assigned formic acid as life prolonging food, so this invention belongs to nontoxic, pollution-free pickle solution.Another characteristics of this invention are: the composition of prescription is organic acid, belongs to weak acid with inorganic three big strong acid ratios, more is a little less than weak acid is also healed to corrosion of metal, but equally matched with mineral acid to the dissolving power of incrustation scale.Remove incrustation scale in the removing equipment with this pickle solution, both can ensure the speed of removal, can alleviate again corrosion of metal.

The mechanism of formulation selection

1, this prescription is nontoxic, pollution-free.

2, each component evenly is organic acid in the prescription, and is very weak to corrosion of metal, but very strong to the dissolving power of incrustation scale.

3, the acid etching of metal is actually a pair of oxidation and the reductive conjugation reaction that carry out simultaneously.Xitix and formic acid are strong reductant, and the oxidized ability of the metal of inhibition is arranged.

4, xitix can generate the iron ascorbat be insoluble to acid with the iron ion action that anode loses electronics, is anodic corrosion inhibitor.

5, xitix has the ability of degraded dissolved oxygen, can separate the unpolarizing of deoxygenation.

The invention will be further described below in conjunction with embodiment.

Embodiment 1

Get (folding hundred): 5 kilograms of butyric acid, 5 kilograms of propionic acid, 0.5 kilogram in xitix, 25 kilograms of formic acid, 2 kilograms of acetic acid, 439.5 kilograms in water weigh carbon salt incrustation scale in order to clean behind the mixing.

Embodiment 2

Get (folding hundred): 245 kilograms of 25 kilograms of butyric acid, 25 kilograms of propionic acid, 5 kilograms in xitix, formic acid double centner, acetic acid double centner, water, this proportioning is to be suitable for the concentrated solution that transport on way far away.

Embodiment 3

Get (folding hundred): 5 kilograms of butyric acid, 5 kilograms of propionic acid, 5 kilograms in xitix, 25 kilograms of formic acid, 25 kilograms of acetic acid, 435 kilograms in water are used to clean the equipment that has rusty scale and incrustation scale concurrently after the mixing.

The corrosion speed of following test-results proof different concns pickle solution

Liquor strength (%) corrosion speed (g/m ²H) test conditions (℃)

5 0.162

10 0.171 t=15+5

15 0.183

20 0.190

Claims

1, a kind of safety pickle, it is characterized in that: be made up of butyric acid, propionic acid, xitix, formic acid, acetic acid and water, raw materials used weight percent is butyric acid 1-5%, propionic acid 1-5%, xitix 0.1-1%, formic acid 5-20%, acetic acid 5-20%, water 49-87.9%.