Stainless Steel and the passive layer Steel is an alloy of iron and carbon. Contrary to carbon steel, the presence of a minimum of 10.5 % chromium in the stainless steel gives it the property of corrosion resistance. Indeed, on contact with oxygen, a chromium oxide layer is formed on the surface of the material.
Sinus Drainage & Stomach Problems. One of the primary results of sinus congestion is drainage. Sinus drainage is expelled in two basic ways: through the nose and the back of the throat. When sinus drainage is expelled in back of the throat, it is referred to as postnasal drip and can cause stomach discomfort.
When people say that they have drainage, they usually mean one of two different things. If by drainage you mean the you can blow your nose and excessive amounts of liquid are produced, the best name for that is rhinorrhea, or runny nose. If you mean that you feel drainage going down your throat then the best name for that is post nasal drip. The distinction between the two is very important. Often people have both, and in that case the rhinorrhea is the more important symptom from a diagnostic standpoint.