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.
Answer   The liquid that is building up at the back of the throat is actually mucus (sometime referred to as phlegm). This symptom is known as post nasal drip.   â¦ Post Nasal Drip results due to your body being unable to get rid of mucus regularly, usually due to nasal or sinus congestion.