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Acid washing method of titanium and zirconium materials without acid-free fog

A pickling and acid mist technology, which is applied in the field of pickling of metal materials, can solve the problem of high processing cost, achieve the effects of less investment, simple operation process, and simple site requirements

Active Publication Date: 2012-12-05
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most adopted method is to seal the acid mist and then treat it. The treatment cost is high, and the problem is not solved from the source of the acid mist.

Method used

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  • Acid washing method of titanium and zirconium materials without acid-free fog

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, such as figure 1 and figure 2 As shown, the horizontal section of the pipeline one 1 and the horizontal section of the pipeline two 2 are arranged in parallel in the pickling tank 3; the pipe wall of the horizontal section of the pipeline one 1 is uniformly provided with a through hole one 1-1, and the pipeline two Through-holes 2-1 are uniformly arranged on the pipe wall of the horizontal section of 2;

[0035] Step 2, put the support member 4 for supporting the titanium or zirconium material to be pickled into the pickling tank 3;

[0036] Step 3: Add water to the pickling tank 3 where the support 4 is placed in step 2, and then feed compressed air into the pipeline 1, the compressed air is blown into the water through the through hole 1-1, and at the same time, it is injected into the pipeline 2 2 Pass into nitric acid, nitric acid enters in the pickling tank 3 through the through hole 2-1 and is diluted in the water in the pickling tank 3, after passing t...

Embodiment 2

[0048] Step 1, such as figure 1 and figure 2 As shown, the horizontal section of the pipeline one 1 and the horizontal section of the pipeline two 2 are arranged in parallel in the pickling tank 3; the pipe wall of the horizontal section of the pipeline one 1 is uniformly provided with a through hole one 1-1, and the pipeline two Through-holes 2-1 are uniformly arranged on the pipe wall of the horizontal section of 2;

[0049] Step 2, put the support member 4 for supporting the titanium or zirconium material to be pickled into the pickling tank 3;

[0050] Step 3: Add water to the pickling tank 3 where the support 4 is placed in step 2, and then feed compressed air into the pipeline 1, the compressed air is blown into the water through the through hole 1-1, and at the same time, it is injected into the pipeline 2 2 Pass into nitric acid, nitric acid enters in the pickling tank 3 through the through hole 2-1 and is diluted in the water in the pickling tank 3, after passing t...

Embodiment 3

[0062] Step 1, such as figure 1 and figure 2 As shown, the horizontal section of the pipeline one 1 and the horizontal section of the pipeline two 2 are arranged in parallel in the pickling tank 3; the pipe wall of the horizontal section of the pipeline one 1 is uniformly provided with a through hole one 1-1, and the pipeline two Through-holes 2-1 are uniformly arranged on the pipe wall of the horizontal section of 2;

[0063] Step 2, put the support member 4 for supporting the titanium or zirconium material to be pickled into the pickling tank 3;

[0064] Step 3: Add water to the pickling tank 3 where the support 4 is placed in step 2, and then feed compressed air into the pipeline 1, the compressed air is blown into the water through the through hole 1-1, and at the same time, it is injected into the pipeline 2 2 Pass into nitric acid, nitric acid enters in the pickling tank 3 through the through hole 2-1 and is diluted in the water in the pickling tank 3, after passing t...

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Abstract

The invention discloses an acid washing method of titanium and zirconium materials without acid-free fog. The method provided by the invention comprises the following steps of: 1, arranging a horizontal section of a pipeline I which is uniformly provided with through holes I and the horizontal section of a pipeline II which is uniformly provided with through holes II into an acid washing groove in parallel; 2, putting a support member into the acid washing groove; 3, adding water into the acid washing groove and then inletting compressed air into the pipeline I; blowing the compressed air into the water by using the through holes I; meanwhile, inletting nitric acid into the pipeline II, inletting the nitric acid into the acid washing groove through the through holes II and diluting the nitric acid into the water in the acid washing groove; and then adding hydrofluoric acid to form an acid washing solution; and 4, placing a titanium material or a zirconium material to be washed with acid on the support member and completely immersing the titanium material or the zirconium material to be washed with the acid into the acid washing solution to carry out the acid washing. With the method provided by the invention, the nitric acid is diluted into the water in time through the pipeline and the compressed air is blown in, so that nitrogen oxide smog is not generated in the process of preparing the acid washing solution and in the process of washing with the acid and damages to the environment and operation workers are not caused.

Description

technical field [0001] The invention belongs to the technical field of metal material pickling, and in particular relates to an acid-mist-free pickling method for titanium and zirconium materials. Background technique [0002] Titanium and zirconium materials are widely used in chemical industry, aerospace and other fields due to their excellent corrosion resistance and high specific strength. In the cold working process of this material, in order to eliminate the work hardening phenomenon produced in the cold working process, recrystallization annealing must be carried out. Due to the high chemical activity of titanium and zirconium materials, oil removal and pickling are generally required before heat treatment, and then vacuum heat treatment. [0003] The main components of the pickling solution during pickling of titanium and zirconium materials are hydrofluoric acid (HF) and nitric acid (HNO 3 ), in the preparation process of the pickling solution, since nitric acid w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10
Inventor 杨亚社王伟张红法杨永福翟孝李刚杨建朝
Owner WESTERN TITANIUM TECH
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