阅读说明：本技术 一种用于锌镍合金电镀层退镀的除灰剂和使用方法 (Dedusting agent for deplating zinc-nickel alloy electroplated layer and use method ) 是由 王世金 李树泉 谢金平 赖彩燕 范小玲 于 2020-11-20 设计创作，主要内容包括：一种用于锌镍合金电镀层退镀的除灰剂和使用方法,除灰剂由以下组分组成：A剂、B剂和溶剂；A剂由下列组分组成：40-80g/L的碳酸盐和100-140g/L的碱液；B剂由下列组分组成：20-30g/L的钠盐除剂和30-45g/L的重铬酸盐；碳酸盐为碳酸钠和/或碳酸钾；碱液为氢氧化钠和/或氢氧化钾；钠盐除剂为氯酸钠或次氯酸钠；重铬酸盐为重铬酸钠或重铬酸钾；使用方法,通过步骤(1)-步骤(3)利用除灰剂将工件浸泡于槽内。本除灰剂用于处理返镀工件,以去除返镀工件因退镀而出现的黑色氧化灰,以使返镀工件表面与之前来料工件表面外观完全一致,不伤基体,直接进返镀电镀即可。(An ash remover for the deplating of a zinc-nickel alloy electroplated layer and a using method thereof, wherein the ash remover comprises the following components: an agent A, an agent B and a solvent; the agent A consists of the following components: 40-80g/L carbonate and 100-140g/L alkali liquor; the agent B consists of the following components: 20-30g/L of sodium salt remover and 30-45g/L of dichromate; the carbonate is sodium carbonate and/or potassium carbonate; the alkali liquor is sodium hydroxide and/or potassium hydroxide; the sodium salt remover is sodium chlorate or sodium hypochlorite; the dichromate is sodium dichromate or potassium dichromate; the using method comprises the step (1) to the step (3) of soaking the workpiece in the groove by using the ash remover. The dust remover is used for treating a back-plating workpiece to remove black oxidized dust generated by back-plating of the back-plating workpiece, so that the surface of the back-plating workpiece is completely consistent with the surface of the workpiece fed before in appearance, a matrix is not damaged, and the back-plating electroplating is directly carried out.)

1. The ash remover for the deplating of the zinc-nickel alloy electroplated layer is characterized by comprising the following components: an agent A, an agent B and a solvent;

the agent A consists of the following components: 40-80g/L carbonate and 100-140g/L alkali liquor;

the agent B consists of the following components: 20-30g/L of sodium salt remover and 30-45g/L of dichromate;

the carbonate is sodium carbonate and/or potassium carbonate; the alkali liquor is sodium hydroxide and/or potassium hydroxide;

the sodium salt remover is sodium chlorate or sodium hypochlorite; the dichromate is sodium dichromate or potassium dichromate.

2. The ash remover of claim 1, wherein the agent A is composed of the following components: 60-80g/L of sodium carbonate and 120-140g/L of sodium hydroxide;

the agent B consists of the following components: 20-30g/L of sodium chlorate and 30-45g/L of sodium dichromate.

3. The ash remover of claim 1, wherein the agent A is composed of the following components: 40-60g/L potassium carbonate and 100-120g/L potassium hydroxide;

the agent B consists of the following components: 25-35g/L of sodium hypochlorite and 30-40g/L of potassium dichromate.

4. The ash remover according to any one of claims 1-3, wherein the ash remover comprises the following components in percentage by weight: 10-20% of agent A, 10-20% of agent B and 65-75% of solvent.

5. The ash remover of claim 4, wherein the solvent is water.

6. The method for using the ash remover according to any one of claims 1-5, characterized by comprising the following steps:

step (1): adding a solvent into the tank; adding the agent A and the agent B, and uniformly stirring to prepare an ash remover;

step (2): controlling the temperature of the ash remover to be 25-60 ℃;

and (3): and soaking the workpiece in the tank for 30-60 seconds.

7. The use method according to claim 6, wherein in the step (3), when the soaking time needs to be prolonged by more than 15 seconds, the agent A and the agent B are added in an amount of 10% by weight.

Technical Field

The invention relates to the technical field of dust removing agents, in particular to a dust removing agent for deplating a zinc-nickel alloy electroplated layer and a using method thereof.

Background

After the zinc-nickel alloy electroplated layer is deplated, a layer of black oxidized ash is easily generated on the surface and needs to be removed in an acidic chemical polishing solution. However, the acidic chemical polishing solution contains active ingredients such as hydrogen peroxide and ammonium bifluoride, and is very unstable, fast in volatilization, large in consumption and difficult to control in the production process. Meanwhile, after the back plating workpiece is subjected to acid chemical polishing treatment, a base body is easy to damage, the surface appearance of the treated workpiece is inconsistent with the surface appearance of the workpiece which is fed before, the difficulty of subsequent back plating electroplating is increased, and the bright appearance effect of electroplating of a zinc-nickel electroplating bath needs to be adjusted.

Disclosure of Invention

The invention aims to provide an ash remover for stripping a zinc-nickel alloy electroplated layer, which removes ash for a workpiece to be re-plated after an agent A, an agent B and a solvent are combined.

The invention also provides a using method of the ash remover, which is used for removing the workpiece by the ash remover.

In order to achieve the purpose, the invention adopts the following technical scheme:

the ash remover for the deplating of the zinc-nickel alloy electroplated layer comprises the following components: an agent A, an agent B and a solvent;

the agent A consists of the following components: 40-80g/L carbonate and 100-140g/L alkali liquor;

the agent B consists of the following components: 20-30g/L of sodium salt remover and 30-45g/L of dichromate;

the carbonate is sodium carbonate and/or potassium carbonate; the alkali liquor is sodium hydroxide and/or potassium hydroxide;

the sodium salt remover is sodium chlorate or sodium hypochlorite; the dichromate is sodium dichromate or potassium dichromate.

Preferably, the agent A consists of the following components: 60-80g/L of sodium carbonate and 120-140g/L of sodium hydroxide;

the agent B consists of the following components: 20-30g/L of sodium chlorate and 30-45g/L of sodium dichromate.

Preferably, the agent A consists of the following components: 40-60g/L potassium carbonate and 100-120g/L potassium hydroxide;

the agent B consists of the following components: 25-35g/L of sodium hypochlorite and 30-40g/L of potassium dichromate.

Preferably, the composition comprises the following components in percentage by weight: 10-20% of agent A, 10-20% of agent B and 65-75% of solvent.

Preferably, the solvent is water.

The use method of the ash remover comprises the following steps:

step (1): adding a solvent into the tank; adding the agent A and the agent B, and uniformly stirring to prepare an ash remover;

step (2): controlling the temperature of the ash remover to be 25-60 ℃;

and (3): and soaking the workpiece in the tank for 30-60 seconds.

Preferably, in the step (3), when the soaking time needs to be prolonged by more than 15 seconds, the agent A and the agent B are added in an amount of 10% by weight.

The invention has the beneficial effects that:

the dust remover is used for treating a back-plating workpiece to remove black oxidized dust generated by back-plating of the back-plating workpiece, so that the surface of the back-plating workpiece is completely consistent with the surface of the workpiece fed before in appearance, a matrix is not damaged, and the back-plating electroplating is directly carried out.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

The ash remover for the deplating of the zinc-nickel alloy electroplated layer comprises the following components: an agent A, an agent B and a solvent;

the agent A consists of the following components: 40-80g/L carbonate and 100-140g/L alkali liquor;

the agent B consists of the following components: 20-30g/L of sodium salt remover and 30-45g/L of dichromate;

the carbonate is sodium carbonate and/or potassium carbonate; the alkali liquor is sodium hydroxide and/or potassium hydroxide;

the sodium salt remover is sodium chlorate or sodium hypochlorite; the dichromate is sodium dichromate or potassium dichromate.

The dust remover is used for treating a back-plating workpiece to remove black oxidized dust generated by back-plating of the back-plating workpiece, so that the surface of the back-plating workpiece is completely consistent with the surface of the workpiece fed before in appearance, a matrix is not damaged, and the back-plating electroplating is directly carried out.

The ash remover is alkaline as a whole, and is prepared from sodium carbonate and/or potassium carbonate, sodium hydroxide and/or potassium hydroxide, sodium chlorate or sodium hypochlorite and sodium dichromate or potassium dichromate.

Preferably, the agent A consists of the following components: 60-80g/L of sodium carbonate and 120-140g/L of sodium hydroxide;

the agent B consists of the following components: 20-30g/L of sodium chlorate and 30-45g/L of sodium dichromate.

Preferably, the agent A consists of the following components: 40-60g/L potassium carbonate and 100-120g/L potassium hydroxide;

the agent B consists of the following components: 25-35g/L of sodium hypochlorite and 30-40g/L of potassium dichromate.

Preferably, the composition comprises the following components in percentage by weight: 10-20% of agent A, 10-20% of agent B and 65-75% of solvent.

Preferably, the solvent is water. The solvent is used for uniformly mixing the agent A and the agent B, so that the agent A and the agent B can remove ash at specific concentrations, and the ash removing agent can achieve the optimal ash removing effect.

The use method of the ash remover comprises the following steps:

step (1): adding a solvent into the tank; adding the agent A and the agent B, and uniformly stirring to prepare an ash remover;

step (2): controlling the temperature of the ash remover to be 25-60 ℃;

and (3): and soaking the workpiece in the tank for 30-60 seconds.

Preferably, in the step (3), when the soaking time needs to be prolonged by more than 15 seconds, the agent A and the agent B are added in an amount of 10% by weight.

The contact time of the dust remover and a deplating workpiece can be longer by improving the soaking time in the using process of the dust remover; preferably, 10% of the agent A and the agent B can be added, so that the deplated workpiece can react with the ash removing agent with higher concentration, and the ash removing efficiency can be improved after the soaking time is prolonged.

And (3) performance testing:

soaking the deplating workpiece in an ash removing agent for 40 seconds; the deplating workpiece soaked by the dedusting agent is subjected to grade judgment according to the following standards: the standards are divided into first-level, second-level and third-level; the first level is that the deplating workpiece is completely ashless; the second level is that the deplated workpiece is slightly provided with a little ash, but the surface of the deplated workpiece is not influenced; the third level is that the surface of the deplated workpiece is seriously grey, which affects the surface brightness of the deplated workpiece.

1. And (3) after treatment, placing the deplated workpiece in an environment with sufficient light, and observing whether ash-free residues exist on the surface of the deplated workpiece.

2. And after treatment, soaking the white cloth with purified water, wiping the surface of the deplated workpiece, and observing whether ash-free residues exist on the surface of the wiped part of the deplated workpiece.

3. After treatment, the white cloth is soaked by alcohol, the surface of the deplated workpiece is wiped, and the ashless residue is observed on the surface of the wiped part of the deplated workpiece.

Example A:

step (1): adding 70% of solvent into the tank; adding 15% of the agent A and 15% of the agent B, and uniformly stirring to obtain an ash remover; the specific components of the agent A and the agent B are shown in Table 1; the agent A consists of the following components: 70g/L of sodium carbonate and 130g/L of sodium hydroxide; the agent B consists of the following components: 25g/L of sodium chlorate and 40g/L of sodium dichromate; the solvent is water.

Step (2): controlling the temperature of the ash remover to 25 ℃;

and (3): and soaking the workpiece in the tank for 40 seconds.

TABLE 1 composition distribution of the Ash-removing Agents

TABLE 2 Performance testing of example A

Example A1

Example A2

Example A3

Example A4

Comparative example A1

Comparative example A2

Comparative example A3

Comparative example A4

Appearance of the product

Level 1

Level 1

Level 1

Level 1

Level 1

Level 1

Level 1

Stage 2

Purified water

Level 1

Level 1

Level 1

Level 1

Grade 3

Grade 3

Grade 3

Grade 3

Alcohol

Level 1

Level 1

Level 1

Level 1

Grade 3

Grade 3

Grade 3

Grade 3

Description of the drawings:

1. it is clear from examples A1-A4 that examples A1-A4 have good effect of removing ash from the deplated workpiece, and that examples A1-A4 are all class 1 and the surface of the deplated workpiece has no ash residue, regardless of visual observation, wiping with white cloth soaked with pure water or wiping with alcohol cloth soaked with pure water; and after the surface of the white cloth is wiped by the white cloth, no ash residue exists on the surface of the white cloth, which indicates that the ash removing agent completely removes ash on the surface of the deplating workpiece.

2. It is clear from example A1 and comparative examples A1-A4 that in comparative example A1, sodium hydroxide or potassium hydroxide is not used as the alkaline solution of the agent A, and the agent A of comparative example A1 is only sodium carbonate, and when it is mixed with the agent B, the effect of ash removal is poor, and although there is no ash residue on the surface after ash removal, a large amount of ash remains on the surface and on the white cloth after wiping with water or alcohol; similarly, comparative example A2, which did not use sodium carbonate or potassium carbonate as the carbonate of agent A, used sodium hydroxide alone as agent A, and when used in combination with agent B, although there was no ash left on the surface after ash removal, a large amount of ash remained on the surface and on the white cloth after wiping with water or alcohol; comparative example A1 and comparative example A2 show that the ash remover of the scheme needs to use carbonate and alkali liquor in the agent A, and if any one of the carbonate and alkali liquor is used alone, the ash removal effect is poor.

Comparative example a3 used only sodium chlorate as the sodium salt remover and no dichromate; comparative example a4 used only sodium dichromate as the dichromate salt and did not use a sodium salt remover; neither comparative example A3 nor comparative example a4 exhibited a poor ash removal effect; comparative example a3, although no ash remained on the surface after ash removal, a large amount of ash remained on the surface and the white cloth after wiping with water or alcohol; in contrast, comparative example A4, there was a little ash on the surface after ash removal, and a large amount of ash remained on the surface and the white cloth after wiping with water or alcohol. It is demonstrated that comparative examples A3 and A4, when the agent B was selected, had poor ash removal in the absence of the sodium salt remover or dichromate.

In conclusion, the agent A needs to be matched with carbonate and alkali liquor, the agent B needs to be matched with a sodium salt remover and dichromate, the dust removing effect can be exerted to the best, and the destaticized workpiece after dust removal can have a front bright effect.

Example B:

step (1): adding 65% of solvent into the tank; adding 10% of agent A and 25% of agent B, and uniformly stirring to obtain an ash remover; the agent A consists of the following components: 60g/L of sodium carbonate and 140g/L of sodium hydroxide; the agent B consists of the following components: 20g/L of sodium chlorate and 45g/L of sodium dichromate, and the solvent is water.

Step (2): controlling the temperature of the ash remover to 60 ℃;

and (3): and soaking the workpiece in the tank for 30 seconds.

Example C:

step (1): adding 75% of solvent into the tank; adding 5% of agent A and 20% of agent B, and uniformly stirring to obtain an ash remover; the agent A consists of the following components: 80g/L of sodium carbonate and 120g/L of sodium hydroxide; the agent B consists of the following components: 30g/L of sodium chlorate, 30g/L of sodium dichromate and water as a solvent.

Step (2): controlling the temperature of the ash remover to 50 ℃;

and (3): and soaking the workpiece in the tank for 60 seconds.

Example D:

step (1): adding 65% of solvent into the tank; adding 20% of the agent A and 15% of the agent B, and uniformly stirring to obtain an ash remover; the agent A consists of the following components: 60g/L potassium carbonate and 100g/L potassium hydroxide; the agent B consists of the following components: 35g/L of sodium hypochlorite and 30g/L of potassium dichromate, and the solvent is water.

Step (2): controlling the temperature of the ash remover to 50 ℃;

and (3): and soaking the workpiece in the tank for 60 seconds.

Example E:

step (1): adding 65% of solvent into the tank; adding 20% of the agent A and 15% of the agent B, and uniformly stirring to obtain an ash remover; the agent A consists of the following components: 40g/L potassium carbonate and 120g/L potassium hydroxide; the agent B consists of the following components: 25g/L of sodium hypochlorite and 40g/L of potassium dichromate, and the solvent is water.

Step (2): controlling the temperature of the ash remover to 50 ℃;

and (3): and soaking the workpiece in the tank for 60 seconds.

TABLE 3 Performance testing of examples B-E

	Example B	Example C	Example D	Example E
					Appearance of the product	Level 1	Level 1	Level 1	Level 1
Purified water	Level 1	Level 1	Level 1	Level 1
					Alcohol	Level 1	Level 1	Level 1	Level 1

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.