Should you clean no clean flux?
PCBs with flux residue may face problems such as parasitic leakage, dendrite growth, electrochemical migration, and shorting. Therefore, cleaning the no-clean flux residue is no longer an optional process; rather it’s now indispensable for long-term PCB reliability, functionality, and performance.
How do you clean no clean flux residue?
In order to effectively clean and remove no clean solder pastes and no clean flux residues, a polar solvent or a solution of water and saponifier is necessary. Most no clean pastes require an organic saponifier for effective flux removal, but some can be cleaned with inorganic saponifiers.
What does no clean solder mean?
No-clean solder pastes cannot be cleaned with water alone. A solvent or a solution of water and saponifier is necessary. Most no-clean pastes require an organic saponifier for effective defluxing, but some can be cleaned with inorganic saponifiers.
What is meant by potting compound?
Definition of potting compound : a protective insulating and sealing plastic used to embed electric coils in a container.
What is no clean flux made of?
No-clean fluxes can be either made with natural rosin, or contain synthetic resins. Rosin-based no-clean flux solutions are essentially the same as the rosin (R Type) fluxes, but usually contain natural gum rosin at a much lower concentration than that used in the R Type (R, RMA and RA) flux solutions.
What is meant by no-clean flux?
No-clean flux is really “low-residue” solder paste. Post reflow, it leaves trace amounts of noncorrosive, resinous residue on or around solder joints, varying in color from transparent to amber. The lower the solids content (resins, gelling agents and activators) in the paste, the lower the residue left on the board.
How do you choose a potting compound?
Epoxy potting compounds generally have better adhesion, high temperature resistance, and chemical resistance. Epoxies also tend to have higher rigidity, modulus, and tensile strength. They also generally have a very good moisture resistance, making them the preferred option for outdoor applications.
Is rosin No clean flux?
How do you remove potting compound?
However, you can try the following common ways of de-potting, ordered from easiest to hardest:
- Heating it up. Some compounds separate from the substrate when you just heat it to about 150 Celsius.
- Hit it with a hammer.
- Acetone bath.
- Heated nitric acid bath.
What is potting compound made of?
Thermosetting plastics or silicone rubber gels are often used, though epoxy resins are also very common.
What is epoxy potting compound?
MG Chemicals offers a wide range of epoxy potting compounds for protecting printed circuit boards and electronic devices. The best electronic epoxy encapsulant potting compound provides superior protection against water damage and chemical, mechanical, thermal or electrical shock.
Is it OK to leave flux on PCB?
Although there is a sufficient amount of flux present in the core of the solder wire to get your job done, the technicians (to make their job easy) tend to use additional flux in form of paste or liquid during the rework on the PCB. There is no problem with the use of flux during soldering.
What is no-clean flux made of?
What is the primary purpose of potting connectors?
Backpotting (or back-potting) is widely used in the connector industry to refer to the use of a potting compound on the rear of a connector (normally a cable connector). Potting is the filling of an area using an epoxy resin or similar liquid compound, which then hardens to a solid in-fill or barrier.
How do you remove silicone potting compound?
try acetone, or nail polish remover.