English to Spanish Tech/Engineering Chemistry; Chem Sci/Eng

Could it be "grabado" in this context?

Why would I need to etch tubing?
Fluoropolymers such as PTFE, FEP, and PFA (often called Teflon) are very lubricious (slippery). This lubricity and the chemical composition of fluoropolymers reduces their bondability. Etching alters the surface properties of the polymer allowing it to be bonded with conventional adhesives.
How does it work?
Etching is performed by the chemical reaction between a sodium solution and the fluorine molecules on the surface of the tubing. Fluorine molecules are stripped from the carbon backbone of the fluoropolymer. This leaves the carbon atoms with a deficiency of electrons. When the etched material is exposed to air, oxygen molecules, water vapor, and hydrogen allow restoration of the electrons. This restoration process results in a group of organic molecules responsible for adhesion.
Will etching change the properties of my tubing?
The etching process only penetrates to a depth of a few angstroms so the properties of the tubing will remain mostly unaffected. However the etching process will darken the surface of the material, usually to a brown or tan shade. Surface lubricity is also reduced by the etching process.

What do you thin? I'll appreciate a lot your opinion.
Thanks