![]() ![]() It goes through the concrete, which is both porous and permeable (I recently learned the difference, check the link at the end of this), and due to some very interesting chemistry that involves polarized water molecules, it can be transported UP HILL (both ways, in the middle of winter, through three feet of snow I tell ya). Since we have established your house's slab/foundation is not water or vapor PROOF, now let's talk about transportation of water. Our yard never floods, and we even have gutters with downspouts discharging several feet away from the foundation. (well there is a giant hint above)? I mean, a leak detection company has been out and they did not find any leaks under the slab in the supply lines. So back to the original point, how can moisture get from outside my house to the interior part where my floor is now swelling, decaying, moldy, etc. AND YOU MUST DO YOURSELF A FAVOR AND READ THIS ARTICLE: ALSO, SIDE NOTE - NEVER PUT A VAPOR RETARDER ON THE INTERIOR WALL IN FLORIDA. For information on brazing products or services, click here or contact us.BEAUTIFUL DIAGRAM FROM BUILDING SCIENCE CORPORATION. ![]() Questions? Lucas-Milhaupt experts can help you navigate the challenges of joining metals. For more information from Lucas-Milhaupt on proper brazing procedures, click here. Successful capillary action-the process that allows alloys to flow into the joint between two metal parts-is crucial to successful brazing. Parts that are not properly cleaned may carry grease or other debris which will impede the process of capillarity. Variation in spacing will affect the success of your brazing operation because capillarity will be compromised. However, it leaves voids where the oily surfaces interfere with capillarity. If this were a braze joint, it would not be a sound one.įrom these illustrations, we can understand several principles relating to capillarity and brazing.įirst, joint gaps must be of correct, uniform size for capillary action to occur. When we insert these plates into the tray, the liquid rises to fill the gap. But the inside surfaces of the glass have been marked with greasy fingerprints. Test 3: For our next experiment, we have glass plates separated by shims representing an ideal, uniform clearance of 0.0015" or 0.038mm. Remember, in our first test, the liquid filled the gap between the plates completely because the space was uniform, so capillarity could operate. Then the gap becomes too large, and capillarity Only to the point where the clearance is 0.005 - 0.006" or 0.127 Now, when we insert the plates into the tray, we see the liquidĬan only rise part way. These plates are separated by a 0.0015" or 0.038mm shim at the bottom, and a heavier shim of 0.015" or 0.381mm at the top. Test 2: Next, we will demonstrate what happens when we don't have a proper, uniform clearance. This illustrates the value of a close and uniform clearance for successful capillarity during brazing. ![]() Let's see what happens when we dip the bottom into a tray of liquid.Īs you can see, the liquid has been drawn up smoothly by capillarity to fill the entire clearance between the plates. This gives us an ideal spacing for capillary action to occur. Test 1: Here, we have two glass plates, with shims of equal size, 0.0015" or 0.381mm, inserted at the top and bottom. ![]() Let's head to the lab, where we will conduct several experiment depicting successful capillary action, then capillarity which is inhibited by several factors. Capillarity is defined as movement of a liquid along the surface of a solid caused by the attraction of molecules in the liquid to the molecules of the solid. ![]()
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