In modern SMT manufacturing, the reflow process plays a decisive role in determining solder joint quality. Many production lines use nitrogen (N₂) to reduce oxidation and achieve a clean, consistent solder appearance. But is nitrogen always necessary?
The short answer: not always.
Why nitrogen is used in the first place
During reflow soldering, both flux and metal powders are sensitive to oxygen exposure.
A nitrogen atmosphere is often introduced to suppress oxidation, improve wetting behavior, and ensure clean solder joints—especially with very small components.
However, operating a nitrogen-equipped reflow oven comes with significant costs, both in equipment and continuous gas consumption.
This makes it essential to ask: When is nitrogen truly required—and when is it not?
Perfect results without nitrogen – with SC BLF09
At Solder Chemistry, we developed our SC BLF09 specifically for reliable performance in standard ambient air.
This means you achieve stable, clean, and reproducible solder joints without nitrogen supply.
Its advanced flux system and high oxidation resistance prevent solder balling and slump even under normal atmospheric conditions—no protective gas needed.
Only in cases involving extremely small or sensitive components—such as fine-pitch devices, BGAs, or CSP packages—can nitrogen offer additional benefits by further enhancing wetting performance.
Less nitrogen = higher cost efficiency
Where nitrogen is not required, eliminating it offers clear economic advantages:
• No ongoing gas consumption
• Lower energy usage for gas preparation and supply
• Simplified oven operation and reduced maintenance
With SC BLF09, you benefit from high process stability while substantially reducing operating costs—without compromising quality.
A sustainable and economical choice
Using less nitrogen also means less energy consumption, lower CO₂ emissions, and a more environmentally responsible production process.
Combined with our recycled metals, biodegradable containers, and grass-fiber packaging, SC BLF09 perfectly reflects our commitment to uniting technological efficiency with environmental responsibility.
