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Why is nitrogen used in selective wave soldering?

The ultimate goal of all welding equipment or tools is to achieve better solder joints. Selective wave soldering is a high-end point-to-point welding method among all welding methods; in order to increase the quality and reliability of solder joints. All selective soldering equipment is equipped with a nitrogen protection part. Nitrogen is an inert gas, which can improve the wettability of the components and printed circuit board welding surface, reduce the degree of oxidation, and accelerate the welding reaction speed during welding. Compared with welding in the air environment, welding in a nitrogen environment can theoretically reduce the required welding temperature, reduce process defects, and form good solder joints.

09-04

2020

Why is nitrogen used in selective wave soldering?
Why is nitrogen used in selective wave soldering?

Introduction to Food Industry Nitrogen Charging

11-05

2018

Introduction to Food Industry Nitrogen Charging
Introduction to Food Industry Nitrogen Charging

The application of nitrogen in the food industry

11-05

2018

The application of nitrogen in the food industry
The application of nitrogen in the food industry

Physicochemical properties of oxygen (O2)

11-05

2018

Physicochemical properties of oxygen (O2)
Physicochemical properties of oxygen (O2)

Ammonia (NH3): Physicochemical properties

11-05

2018

Ammonia (NH3): Physicochemical properties
Ammonia (NH3): Physicochemical properties

Physical properties of hydrogen (H2)

11-05

2018

Physical properties of hydrogen (H2)
Physical properties of hydrogen (H2)

Physicochemical properties of nitrogen (N2)

11-05

2018

Physicochemical properties of nitrogen (N2)
Physicochemical properties of nitrogen (N2)

Methods for preventing rice from getting moldy in summer

11-05

2018

Methods for preventing rice from getting moldy in summer
Methods for preventing rice from getting moldy in summer

Physical and chemical properties of nitrogen

Nitrogen, with the chemical formula N2, is a colorless and odorless gas under normal conditions, and its density is generally lower than that of air. Nitrogen accounts for 78.08% (by volume) of the total volume of the atmosphere, making it the main component of air. Under standard atmospheric pressure, it becomes a colorless liquid when cooled to -195.8℃, and a snow-like solid when cooled to -209.8℃. Nitrogen is chemically inert and hardly reacts with other substances at room temperature, so it is often used as a preservative. However, under high temperature and high energy conditions, it can undergo chemical changes with certain substances to produce new materials useful to humans.

01-29

2019

Physical and chemical properties of nitrogen
Physical and chemical properties of nitrogen
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