charging - Will plugging the Samsung fast charger into a outlet rated 10W/2.1AMP slow down the charge rate?

The S6 comes with a fast wall charger, but how does it work exactly?

I want to plug it into a “one outlet Belkin” with surge protection, that is 2.1AMP for the ome USB port and 10W for the single AC outlet.

Now my question is will plugging the charger into the Belkin slow down the fast charge time?