El piñón está oxidado.

to be

Breakdown of El piñón está oxidado.

• el piñón: the sprocket
• oxidado: rusty

Questions & Answers about El piñón está oxidado.

Why is it está and not es?

Spanish usually uses estar for a condition or state, especially one that can change. Oxidado describes the current condition of the piñón: it is rusted/oxidized.

So:

• El piñón está oxidado = The pinion/sprocket is rusted.
• Es oxidado would sound unnatural here.

A good rule of thumb is:

• ser = what something is
• estar = how something is

Since rust is treated as a resulting state, estar is the normal choice.

What does piñón mean exactly?

Piñón can have different meanings depending on context. In Spain, common meanings include:

• pinion / sprocket / gear in a mechanical or bicycle context
• pine nut in a food context

So the exact meaning depends on the situation. In El piñón está oxidado, the context strongly suggests the mechanical meaning, because something mechanical can be oxidado.

Why is there el at the beginning?

El means the and is the masculine singular definite article.

It is used because piñón is a masculine singular noun:

• el piñón

This usually means we are talking about a specific pinion/sprocket, not just any one.

Compare:

• El piñón está oxidado = The sprocket is rusted.
• Un piñón está oxidado = A sprocket is rusted.