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- What is the solution for successful soldering using lead-free solder?
What is the solution for successful soldering using lead-free solder?
Simply raising the temperature of a soldering iron because of the high melting point may result in faster oxidation and erosion. The problems with lead-free solder can be solved by using products which offer special characteristics described below.
It is these characteristics that Hakko believes to be most important when using lead-free solder.
Soldering-related items
1. Soldering iron
Accurate temperature control and excellent thermal recovery rate enable the use of lead-free solder without the need for setting a higher temperature. |
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2. Solder feed system
Splashes of solder and flux can be reduced by making a groove in solder. |
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3. Solder bath
For a flow solder bath, the special treatments given to the areas susceptible to erosion by solder can reduce the frequency of replacement of deteriorated parts.
For a static solder pot, we designed the pot, which deteriorates faster when using lead-free solder, so that it can be replaced more easily. This reduces the need for repair compared with conventional solder pot. The waiting time before operation can also be reduced by setting parameters according to solder types to make solder melting time shorter.
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4. Thermometer
Conventional thermometers use a sensor which plates eutectic solder in a measuring point to allow thermal conductivity. Changing the solder on the measuring point into tin plating can prevent unnecessary soldering ingredients from adhering to the iron tip. |
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5. Cleaner
Wire type cleaners help less oxidation which is a common problem during cleaning.
Wire type cleaners help less oxidation after cleaning because they remove oxides and excessive solder while leaving some solder on the iron tip.
Sponge type cleaners completely remove solder from the iron tip, which is one of the causes of enhanced oxidation of a tip in lead-free soldering. Another disadvantage is that the temperature of the tip greatly decreases due to a sponge absorbing water.
6. Maintenance
The wettability* of an iron tip can be recovered by removing oxides adhered to the tip with a rotating brush. This allows the tip to be used again.
What is wettability?
"Wetness" is the phenomenon that a liquid which makes contact with a solid flows and spreads out. "Wettability" is the property of a metal surface which expresses the spreadability.
Desoldering-related items
1. Desoldering tool
New heater structure improves thermal recovery rate, reduces temperature drop during work, and improves workability of lead-free solder. Moreover, the shorter distance between the nozzle and filter pipe reduces the chance of clogging with solder. |
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2. Hot air
Applying hot air uniformly to a target eliminates temperature variation in the target, enabling efficient rework. |
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Slender grip is ideal for work in narrow spaces.
3. Other
Pre-heating P.W.B. and other components ensures improved solderability.
Equipment/material-related item
1.Chemical paste
Fine, pure Sn particle with high activation ability removes oxides adhering to an iron tip. The tip can recover its wettability* and can be used again.
Related product: HAKKO FT-700
* What is wettability?
"Wetness" is the phenomenon that a liquid which makes contact with a solid flows and spreads out. "Wettability" is the property of a metal surface which expresses the spreadability.
2.Flux for sheet metal working
Enables excellent solder spreadability and wettability with lead-free solders.
It is also perfect to use with stained glass, assessories, and other applications where lead-free solder is becoming more and more common.
