Again, talking about stuff for which you have no knowledge
Did you miss para 6-3 is the lists of corrosive agents.
In case you'd like to read it again.
6-3. COMMON CORROSIVE AGENTS.
Substances that cause corrosion are called cor rosive agents.
The most common corrosive agents are acids, alkalies, and salts. The at mosphere and water, the two most common media for these agents, may also act as corro sive agents.
a. Any acid will severely corrode most of the alloys used in airframes. The most destructive are sulfuric acid (battery acid), halo gen acids (hydrochloric, hydrofluoric, and hy drobromic), nitrous oxide compounds, and or ganic acids found in the wastes of humans and animals.
b. Alkalies, as a group, are not as corro sive as acids. Aluminum and magnesium al loys are exceedingly prone to corrosive attack by many alkaline solutions unless the solutions contain a corrosion inhibitor. Substances par ticularly corrosive to aluminum are washing soda, potash (wood ashes), and lime (cement dust).
c. The major atmospheric corrosive agents are oxygen and airborne moisture. Corrosion often results from the direct action of atmospheric oxygen and moisture on metal nd the presence of additional moisture often accelerates corrosive attack, particularly on ferrous alloys. The atmosphere may also con tain other corrosive gases and contaminants, particularly industrial and marine salt spray.
d. The corrosiveness of water depends on the type and quantity of dissolved mineral and organic impurities and dissolved gasses (particularly oxygen) in the water. One char acteristic of water that makes it corrosive is its conductivity. Physical factors, such as water temperature and velocity also have a direct bearing on its corrosiveness.
Just because some SALTs are benign, doesn't make it ok to leave them in a seam.