Learn Farsi: آنها فردا قطعات ضد خوردگی و ضد سایش را آزمایش خواهند کرد. - They will test the anti-corrosion and anti-wear parts tomorrow.

The word zed literally means opposite or against. When you link it to a noun using the Ezafe (-e), it creates a compound adjective meaning anti- or counter-. Here, it links to khordegi (corrosion) and sâyesh (wear) to form the adjectives zed-e khordegi (anti-corrosion) and zed-e sâyesh (anti-wear).

Where do the nouns khordegi and sâyesh come from structurally?

Both are derived from verbs, showcasing useful Persian morphology! Khordegi comes from the past participle of khordan (to eat/consume), which is khordeh, plus the suffix -gi to mean the state of being eaten away. Sâyesh is formed from the present stem of sâyidan (to rub/wear down), which is sây, plus the suffix -esh to create a noun of action.

Since there are two anti- adjectives connected by and, how does the Ezafe work with the head noun qeta'ât (parts)?

You only need one Ezafe on the head noun. It is pronounced as qeta'ât-e zedd-e khordegi va zedd-e sâyesh. The Ezafe on qeta'ât applies to the entire coordinated adjective phrase that follows it. Notice that zed also needs its own Ezafe each time to connect to the noun it opposes.

Why is the word for parts written as qeta'ât instead of using the standard Persian plural suffix ?