College composition books whether youre a high school student, college student or just a student of life, theres nothing more academic than a crisp and clean composition book. Normally noclean flux is not water soluble there is water soluble flux available, but it is not noclean. If thats true, then, as phil said, putting a conformal coating over no clean flux residue should not be a problem. The nature of white residue on global leader in solder. Pdf thermal decomposition of solder flux activators.
The designs are so pretty and clean i am also keeping these in mind as a go to gift idea. The problem is not limited only to rosin fluxes and solvent cleaning, but also occurs when water soluble fluxes are used and when either flux type is removed with water. We are a national distributor of soldering stations, consumable and accessories for rework and repair, including no clean, water soluble and rosin flux. No clean refers to a production process in which cleaning of the final product is deemed unnecessary. With collegeruled pages, youll be able to fill each page with ideas, notes or doodles, all with plenty of space to accommodate your own style of handwriting. One of those alternative was noclean soldering materials. The issue is if you havent perfectly deactivated all that solder paste flux, now youre capturing it. I want this to be more durable like the old composition books i used in school, except with blank pages. Fluxes with low solids, sometimes as little as 12%, are called low solids flux, lowresidue flux, or no clean flux. The ionic residues of activator compounds used in the no clean solder flux systems often remain on a printed circuit board assembly surface after the soldering process and may compromise the. There is no such thing as a noclean solder paste, only a low residue solder paste, whose flux residue after reflow, may not have to be cleaned from the board, to ensure board functional reliability. Vikocell no clean solder flux pen for electronics tabbing wire soldering pack of 5 4. As opposed to rosinbased and watersoluble fluxes, they offer a greater application range as well as many advantages with regard to performance. Kester 951 no clean soldering solder liquid flux reflow 4.
Many of the solvents used to clean printed circuit boards were classified as ozone depleting substances. Once the montreal protocol was ratified, industry sought out alternatives to ozone depleting substances. As mentioned before they hold up great and the quality price cant be beat. Oxides make soldering more difficult or even impossible, preventing a metallurgical bond with the solder. I usually use a dedicated flux cleaner fluxclene is one brand, but many are available. Also the pages arent completely blank so not good for a sketch book. Why clean a noclean flux global leader in solder and. They are often composed of weak organic acids, with addition of small amount of rosin or other resins. Kester flux, no clean solder are available at mouser electronics. No clean is a process, not a product no clean fluxes can save a lot of processing time, but residues that can be trapped under high density components are raising reliability concerns. Oxidization happens all of the time but it happens much faster at higher temperatures like when soldering flux cleans metal surfaces and reacts with the oxide layer, leaving a surface primed for a good solder bond.