Brazing Flux

Aluminum brazing flux is an essential chemical auxiliary for the aluminum brazing process. Its core functions include removing the dense aluminum oxide film on aluminum surfaces, forming a protective layer upon melting to prevent re-oxidation of base metals, reducing the interfacial tension of brazing filler metal, enabling adequate flow and spreading of the filler, and achieving reliable hermetic joints of aluminum materials. NOCOLOK® is a registered trademark of Solvay, a global chemical enterprise, and serves as the pioneering brand and worldwide industry benchmark for non-corrosive aluminum brazing fluxes. Products of this series are widely adopted in the brazing fabrication of aluminum radiators and various aluminum components for automotive, home appliance, energy storage, artificial intelligence equipment and other sectors. As the authorized distributor of Solvay NOCOLOK® series products in China, Shanghai Yunhe Materials Technology Co., Ltd. provides domestic customers with full-range NOCOLOK® aluminum brazing flux solutions and supply services tailored to diverse application scenarios.

Supporting Products

In the brazing process, apart from the core 'protagonists'—namely filler metals (brazing wires/pastes) and fluxes—there is an essential category of 'supporting players' known in the industry as Brazing Auxiliaries (or Auxiliary Products). Taking the industry-standard NOCOLOK® portfolio from global benchmark Solvay as an example, these auxiliary products encompass binders, stop-off agents, degreasers, and cleaners. Although they do not directly participate in the metallurgical bonding itself, their functions can be perfectly summarized into four core pillars: flow control, shape retention, quality enhancement, and efficiency boosting. Shanghai Canal International Trade Co.,Ltd is a first-tier distributor for Solvay.

This product line includes 3 core models
Specification
Nocolok Precoating
Nocolok Green-Filler-Stop
Nocolok SURF 225
Application
提高钎剂在铝材表面附着力,减少组装过程中的钎剂脱落
阻止熔融的钎料流入不需要的区域,从而保持金属表面洁净,且不残留任何钎料
提高钎剂分散性能,提高悬浮稳定性,增加铝材表面润湿性的活性剂产品
Technical Documents