阅读说明：本技术 一种适用于高速铜锡复合生产的新型添加剂 (Novel additive suitable for high-speed copper-tin composite production ) 是由 宗殷强 于 2021-05-10 设计创作，主要内容包括：本发明公开了一种适用于高速铜锡复合生产的新型添加剂。其组分为：苄叉丙酮0.05g/L、NP-10乳化剂0.1g/L、烟酸0.1g/L、抗坏血酸、酒石酸及硫酸亚铁复配剂0.5g/L、明胶1.0g/L；其中苄叉丙酮作为主光亮剂,NP-10乳化剂、烟酸、明胶作为辅助光亮剂、抗坏血酸、酒石酸及硫酸亚铁复配剂作为抗氧化剂。本添加剂符合现有高速铜锡复合生产工艺,原料易得且便宜,对人体及环境无害,是一种可靠的、经济型环保的新型添加剂。(The invention discloses a novel additive suitable for high-speed copper-tin composite production. The components are as follows: 0.05g/L, NP-10 g/L of benzalacetone, 0.1g/L of emulsifier, 0.1g/L of nicotinic acid, 0.5g/L of ascorbic acid, tartaric acid and ferrous sulfate compound agent and 1.0g/L of gelatin; wherein the benzalacetone is used as a main brightener, NP-10 emulsifier, nicotinic acid and gelatin are used as auxiliary brighteners, and a compound agent of ascorbic acid, tartaric acid and ferrous sulfate is used as an antioxidant. The additive conforms to the existing high-speed copper-tin composite production process, is easy and cheap in raw materials, is harmless to human bodies and environment, and is a reliable, economical and environment-friendly novel additive.)

1. A novel additive suitable for high-speed copper-tin composite production comprises the following components: 0.05g/L, NP-10 g/L of benzalacetone, 0.1g/L of emulsifier, 0.1g/L of nicotinic acid, 0.5g/L of ascorbic acid, tartaric acid and ferrous sulfate compound agent and 1.0g/L of gelatin; wherein the benzalacetone is used as a main brightener, NP-10 emulsifier, nicotinic acid and gelatin are used as auxiliary brighteners, and a compound agent of ascorbic acid, tartaric acid and ferrous sulfate is used as an antioxidant.

The technical field is as follows:

the invention belongs to the technical field of copper-tin electroplating, and particularly relates to a novel additive suitable for high-speed copper-tin composite production.

Background art:

in the existing tin plating process, the current efficiency of the additive is not high, so that the deposition efficiency of tin is low in the high-speed tin plating process, the tin layer is sparse, and the product quality is influenced. In addition, the existing additive contains beta naphthol component, and the beta naphthol has carcinogenic effect, so that the health of production personnel is endangered.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

The invention content is as follows:

the invention aims to provide a novel additive suitable for high-speed copper-tin composite production, so that the defects in the prior art are overcome.

In order to realize the purpose, the invention provides a novel additive suitable for high-speed copper-tin composite production, which comprises the following components: 0.05g/L, NP-10 g/L of benzalacetone, 0.1g/L of emulsifier, 0.1g/L of nicotinic acid, 0.5g/L of ascorbic acid, tartaric acid and ferrous sulfate compound agent and 1.0g/L of gelatin; wherein the benzalacetone is used as a main brightener, NP-10 emulsifier, nicotinic acid and gelatin are used as auxiliary brighteners, and a compound agent of ascorbic acid, tartaric acid and ferrous sulfate is used as an antioxidant.

Compared with the prior art, the invention has the following beneficial effects:

in the high-speed copper-tin composite production process, the dispersion capacity of the tin plating solution is 90%, the current efficiency is close to 100%, and no hydrogen evolution phenomenon occurs, so that the cathode polarization effect can be greatly increased, the copper-tin bonding force and the weldability are greatly increased, the detection requirements of national standards are exceeded, and in addition, the tin layer is compact and uniform, the crystal grains are fine and dense, and no crack is generated. The additive conforms to the existing high-speed copper-tin composite production process, is easy and cheap in raw materials, is harmless to human bodies and environment, and is a reliable, economical and environment-friendly novel additive.

The specific implementation mode is as follows:

the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Example 1

A novel additive suitable for high-speed copper-tin composite production comprises the following components: 0.05g/L, NP-10 g/L of benzalacetone, 0.1g/L of emulsifier, 0.1g/L of nicotinic acid, 0.5g/L of ascorbic acid, tartaric acid and ferrous sulfate compound agent and 1.0g/L of gelatin; wherein the benzylidene acetone is used as a main brightening agent; NP-10 emulsifier, nicotinic acid and gelatin as auxiliary brightening agent; the compound agent of ascorbic acid, tartaric acid and ferrous sulfate is used as an antioxidant to prevent bivalent tin in the plating solution from being oxidized into tetravalent tin.

The benzylidene acetone is used as a main brightening agent, has larger acting force on electroplating, and has the more effective function of leading metal ions to be separated out at low potential and absorbing the process at high potential. Meanwhile, the benzylidene acetone also has the leveling effect.

The NP-10 emulsifier is a nonionic surfactant, the gelatin is a surfactant, the two and the nicotinic acid are jointly used as auxiliary brightening agents to play a role in refining grains, and the synergistic effect is generated by matching with the main brightening agent. The NP-10 emulsifier and the gelatin also have a dispersing effect, and the uniform covering capability of the tin layer is improved.

The concentration of the benzalacetone, the NP-10 emulsifier, the nicotinic acid, the ascorbic acid, the tartaric acid and ferrous sulfate compound agent and the gelatin is obtained by setting a concentration gradient. Wherein determination of the concentration of benzylidene acetone: other variables are controlled to set their concentration gradient from 0.01-0.2g/L setting, including 0.01, 0.03, 0.05, 0.07, 0.1, 0.13, 0.15, 0.17, 0.2, and the final selected concentration of 0.05g/L, with optimal results.

The novel additive and the original additive are subjected to Hull cell test and electroplating test for comparison.

1) Hull cell test

The test was carried out using a standard Hull cell of 250m L, a 100mm by 70mm cathode, a 0.2mm thick copper sheet and a 70mm by 60mm anode, a 9mm thick tin plate.

The test method comprises the following steps: degreasing → washing → 500 abrasive paper polishing → washing → electroplating.

The test conditions are as follows: the current is 5.0A; the temperature is 45 ℃; time 60 s.

2) Plating test

The electroplating experiment is carried out on a Nichhoff WPT400 copper-tin composite production line.

The electroplating process comprises the following steps: degreasing → cleaning → acid cleaning (deoxidation and activation) → electroplating → cleaning → blow-drying.

The effect pairs of the novel additives to the existing control additives are shown in table 1.

TABLE 1 comparison of the test results of the novel additives with the existing control additives

In the high-speed copper-tin composite production process, the dispersion capacity of the tin plating solution is 90%, the current efficiency is close to 100%, and no hydrogen evolution phenomenon occurs, so that the cathode polarization effect can be greatly increased, the copper-tin bonding force and the weldability are greatly increased, the detection requirements of national standards are exceeded, and in addition, the tin layer is compact and uniform, the crystal grains are fine and dense, and no crack is generated. The additive conforms to the existing high-speed copper-tin composite production process, is easy and cheap in raw materials, is harmless to human bodies and environment, and is a reliable, economical and environment-friendly novel additive.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.