Product Introduction
Copper Chromium-Free Passivation Solution Q/YS.104-3 (Yishun Brand)
The Yishun brand copper chromium-free passivation solution, designated as Q/YS.104-3, is a liquid product with a near-neutral pH. This innovative solution offers an extended service life and cost-effectiveness while being non-toxic and harmless to human health. It is user-friendly and ensures that copper components retain their color for over 18 months without affecting the conductivity of the copper. This product revolutionizes traditional rust prevention methods for copper workpieces. After passivation, the treated copper can pass a salt spray test lasting up to 72 hours. The application methods include spraying, coating, and soaking. It is a single-component solution that requires no mixing before use.
Key Features:
- Long Service Life: Ensures durability and longevity of copper components.
- Cost-Effective: Economical solution for protecting copper parts.
- Non-Toxic: Safe for human handling and environmentally friendly.
- Easy to Use: Simple application process without complex procedures.
- Maintains Conductivity: Does not interfere with the electrical properties of copper.
- Extended Color Retention: Keeps copper components looking new for over 18 months.
- Passes Salt Spray Test: Copper treated with this solution can endure a 72-hour salt spray test.
Application Methods:
- Spraying: Apply the solution using a spray gun for even coverage.
- Coating: Brush or dip the copper component in the solution for thorough coating.
- Soaking: Submerge the copper parts in the solution for complete immersion.
Parameter | Value |
Product Name | Copper Chromium-Free Passivation Solution Q/YS.104-3 |
Brand | Yishun |
Form | Liquid |
pH Level | Near-neutral |
Temperature | 60ºC |
Application Time | 10-15 minutes |
Package Size | 25KG/barrel |
Component Type | Single-component |
Usage Method | Ready to use (no dilution required) |
Salt Spray Test | Passes72-hour test |
Company Profile: Guangzhou Yishun Chemical Co. Ltd
Guangzhou Yishun Chemical Co. Ltd., established in 2010, is a high-tech enterprise specializing in the development, manufacturing, and marketing of chemical products. With over a decade of technical expertise, our products are not only used nationwide but also exported to Europe, America, the Middle East, Southeast Asia, and other regions around the world. Our focus areas include R&D, manufacturing, and marketing of various metal and non-metal surface treatment process fluids, industrial cleaners, and information chemicals.
At Yishun Chemical, we pride ourselves on our ability to develop custom industrial cleaners, chemical stripping agents, and surface treatments for both metals and non-metals, as well as electronic information chemicals. We strive to become a more innovative fine chemical enterprise, continuously providing better concepts, products, and services to various industries. Our goal is to promote the chemical industry to new heights while adhering to a healthy development strategy of "Environmental Protection and Green Home."
Guided by "environmental and green" principles, we lead our R&D and production efforts to manufacture "high, precise, and advanced" chemical products. We continuously improve our innovation system, enhance sustainable development capabilities, and strive to create value for both the enterprise and society. Our aspiration is to be a global leader in eco-friendly chemicals, contributing to a greener and more sustainable future.


Q. How to guarantee the quality?
Up-to-date facilities and technology, strict inspection in production process and final product, inspection before delivery.
Q: Are your products harmful to the health of the workers?
A: The product itself is environmentally friendly and non-toxic, but in order to consider the health of workers and the efficacy of the product, it is necessary to follow the product instructions during use and wear appropriate protection.
Q: How long is your delivery time?
A: Generally it is about 15 days.
Q: What is your terms of payment ?
A: TT payment is favorable. After we build good cooperation, we can discuss other payment terms.