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.
For the past few years I have had had excess mucus and phlegm in the back of my throat. I can feel it there, and I can hack it up and usually get a thick, clear, mucus that I have to spit out or swallow. It is gross. I cough a lot during the morning and at night, and from time to time throughout the day. I try not to clear my throat too severely during work because it is disruptive and disgusting.