CN102953076A - Preparation method of descaling treating fluid for stainless steel weld joints - Google Patents

Abstract

The invention relates to the technical field of chemical descaling, and in particular relates to a preparation method of descaling fluid suitable for stainless steel metal weld joints. The preparation method of the descaling treating fluid for stainless steel weld joints comprises the following steps of: adding 57-78.5% of water by weight to a stirrer at normal temperature; pouring 11-22% of fatty alcohol-polyoxyethylene ether, 0.5-1% of alkylphenol polyoxyethylene, 3-6% of citric acid, 4-8% of tartaric acid, 0.5-1% of anhydrous sodium carbonate, 1-2% of triethanolamine, 1-2% of hydrochloric acid and 0.5-1% of sodium molybdate in sequence while stirring; and stirring the materials for 20-30 minutes after all the materials are added. The descaling treating fluid is simple to operate, has good descaling effect, simultaneously does not corrode the surface of the stainless steel, maintains the gloss of the stainless steel, can be reused, has no harm to skins, is low-carbon and saves cost.

Description

The preparation method of stainless steel weld joint dirty removing processing liquid

Technical field

The present invention relates to the chemical cleaning technical field, especially a kind of preparation method who is applicable to the cleaning mixture of stainless steel metal weld seam.

Background technology

According to the automobile industry in the whole nation, fuel tank, water tank that full-sized car, passenger vehicle, lorry, car etc. have all adopted the 316L stainless steel plate to make, vapor pipe, but stainless weld black sinter is difficult to remove.In order to remove these sinters, traditional method is to utilize nitric acid or hydrofluoric acid to process, although can play the effect of scale removal, strong acid has strong corrodibility to stainless steel surface, makes the attenuation of stainless steel thickness.Because nitric acid or hydrofluoric acid are harmful, therefore necessary careful when scale removal in addition, there is unsafe hidden danger.Particularly have the tart flavour of harmful toxins in nitric acid or the hydrofluoric acid, not only human body is had the strong impulse sense, and the acid mist severe contamination air that produces, the discharging of waste acid water is the severe contamination water resources also.Simultaneously, also must be careful when preparing above-mentioned cleaning mixture, preparation is got up and is bothered very much.

Summary of the invention

The technical problem to be solved in the present invention is: overcome the deficiency in the prior art, the preparation method of stainless steel weld joint dirty removing processing liquid a kind of simple to operate, harmless and free from environmental pollution is provided.

The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method of stainless steel weld joint dirty removing processing liquid has following steps:

(1), under the normal temperature, adding weight percent in stirrer is the water of 57%-78.5%;

(2), throw in while stirring the fatty alcohol-polyoxyethylene ether that weight percent is 11%-22%;

(3), throw in while stirring the alkylphenol polyoxyethylene that weight percent is 0.5%-1%;

(4), throw in while stirring the citric acid that weight percent is 3%-6%;

(5), throw in while stirring the tartrate that weight percent is 4%-8%;

(6), throw in while stirring the anhydrous sodium carbonate that weight percent is 0.5%-1%;

(7), throw in while stirring the trolamine that weight percent is 1%-2%;

(8), throw in while stirring the hydrochloric acid that weight percent is 1%-2%;

(9), throw in while stirring the Sodium orthomolybdate that weight percent is 0.5%-1%;

(10), all be finished product in reinforced complete rear restir 20-30 minute.

Principle of work of the present invention is: alkylphenol polyoxyethylene and anhydrous sodium carbonate have played fat abstraction, remove the grease on stainless steel weld joint surface; Fatty alcohol-polyoxyethylene ether and Sodium orthomolybdate are strengthened harder dirt, oxide skin, hard oil and the sinter of bull pine weld face intensity; Citric acid, tartrate and the hydrochloric acid before bad thing of bull pine are promptly processed; Sodium orthomolybdate, trolamine and anhydrous sodium carbonate are in the stainless steel weld joint surface adsorption that cleans up and generate one deck passive film.

The invention has the beneficial effects as follows: the present invention is simple to operate, and features high scale-removing effect is not corroded stainless surface simultaneously, keeps stainless glossiness; And stainless steel weld joint dirty removing processing liquid can reuse, and without injury, low-carbon environment-friendly is saved cost to skin contact.

Embodiment

The present invention is further illustrated in conjunction with the preferred embodiments now, and fatty alcohol-polyoxyethylene ether is the JFC permeate agent among the embodiment, and alkylphenol polyoxyethylene is emulsifier op-10.

Embodiment 1

The preparation method of stainless steel weld joint dirty removing processing liquid has following steps: under (1), the normal temperature, add 785 kilograms water in stirrer; (2), throw in while stirring 110 kilograms JFC permeate agent; (3), throw in while stirring 5 kilograms OP-10 emulsifying agent; (4), throw in while stirring 30 kilograms of content 99.3% citric acids; (5), throw in while stirring 40 kilograms in content 99% tartrate; (6), throw in while stirring 5 kilograms of content 99% anhydrous sodium carbonates; (7), throw in while stirring 10 kilograms of content 85% trolamines; (8), throw in while stirring 10 kilograms of content 31% hydrochloric acid; (9), throw in while stirring 5 kilograms of content 99% Sodium orthomolybdates; (10), all be finished product in reinforced complete rear restir 20-30 minute.

Embodiment 2

The preparation method of stainless steel weld joint dirty removing processing liquid has following steps: under (1), the normal temperature, add 740 kilograms water in stirrer; (2), throw in while stirring 130 kilograms JFC permeate agent; (3), throw in while stirring 7 kilograms OP-10 emulsifying agent; (4), throw in while stirring 33 kilograms of content 99.3% citric acids; (5), throw in while stirring 48 kilograms in content 99% tartrate; (6), throw in while stirring 7 kilograms of content 99% anhydrous sodium carbonates; (7), throw in while stirring 14 kilograms of content 85% trolamines; (8), throw in while stirring 13 kilograms of content 31% hydrochloric acid; (9), throw in while stirring 8 kilograms of content 99% Sodium orthomolybdates; (10), all be finished product in reinforced complete rear restir 20-30 minute.

Embodiment 3

The preparation method of stainless steel weld joint dirty removing processing liquid has following steps: under (1), the normal temperature, add 690 kilograms water in stirrer; (2), throw in while stirring 150 kilograms JFC permeate agent; (3), throw in while stirring 8 kilograms OP-10 emulsifying agent; (4), throw in while stirring 50 kilograms of content 99.3% citric acids; (5), throw in while stirring 51 kilograms in content 99% tartrate; (6), throw in while stirring 8 kilograms of content 99% anhydrous sodium carbonates; (7), throw in while stirring 16 kilograms of content 85% trolamines; (8), throw in while stirring 18 kilograms of content 31% hydrochloric acid; (9), throw in while stirring 9 kilograms of content 99% Sodium orthomolybdates; (10), all be finished product in reinforced complete rear restir 20-30 minute.

Embodiment 4

The preparation method of stainless steel weld joint dirty removing processing liquid has following steps: under (1), the normal temperature, add 570 kilograms water in stirrer; (2), throw in while stirring 220 kilograms JFC permeate agent; (3), throw in while stirring 10 kilograms OP-10 emulsifying agent; (4), throw in while stirring 60 kilograms of content 99.3% citric acids; (5), throw in while stirring 80 kilograms in content 99% tartrate; (6), throw in while stirring 10 kilograms of content 99% anhydrous sodium carbonates; (7), throw in while stirring 20 kilograms of content 85% trolamines; (8), throw in while stirring 20 kilograms of content 31% hydrochloric acid; (9), throw in while stirring 10 kilograms of content 99% Sodium orthomolybdates; (10), all be finished product in reinforced complete rear restir 20-30 minute.

Above-described embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage that is familiar with technique can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims (1)

1. the preparation method of a stainless steel weld joint dirty removing processing liquid is characterized in that: have following steps:

(1), under the normal temperature, adding weight percent in stirrer is the water of 57%-78.5%;

(2), throw in while stirring the fatty alcohol-polyoxyethylene ether that weight percent is 11%-22%;

(3), throw in while stirring the alkylphenol polyoxyethylene that weight percent is 0.5%-1%;

(4), throw in while stirring the citric acid that weight percent is 3%-6%;

(5), throw in while stirring the tartrate that weight percent is 4%-8%;

(6), throw in while stirring the anhydrous sodium carbonate that weight percent is 0.5%-1%;

(7), throw in while stirring the trolamine that weight percent is 1%-2%;

(8), throw in while stirring the hydrochloric acid that weight percent is 1%-2%;

(9), throw in while stirring the Sodium orthomolybdate that weight percent is 0.5%-1%;

(10), all be finished product in reinforced complete rear restir 20-30 minute.