Used black screws for trex -- They are "rusting"

I am using back zinc screws [LIKE THESE] on my Trex to aluminum stair case for a portch I built back in the fall of last year. I used this type for their strength, and the black looked great with the black slats on the rail. The problem is, they are all rust colored now. If I scrub hard I can get the color back, but one doesn't wan to scrub screws LOL. The place that I bought them from said that black zinc should be treated like stainless .. Wont rust or discolor. Stainless looks tacky and industrial, and I really don't want to use plugs, I like the look of the screws. If I am willing to replace them, it only took a couple hours to install them, I only have 7 steps. But what screw should I replace them with that won't discolor? The screw needs to be machine thread that goes through the trex and aluminum, into a nut on the back side. (Yes the nuts and washers are also black zinc) submitted by /u/lampministrator [link] [comments]

Apr 17, 2025 - 16:23
 0

I am using back zinc screws [LIKE THESE] on my Trex to aluminum stair case for a portch I built back in the fall of last year. I used this type for their strength, and the black looked great with the black slats on the rail.

The problem is, they are all rust colored now. If I scrub hard I can get the color back, but one doesn't wan to scrub screws LOL. The place that I bought them from said that black zinc should be treated like stainless .. Wont rust or discolor.

Stainless looks tacky and industrial, and I really don't want to use plugs, I like the look of the screws.

If I am willing to replace them, it only took a couple hours to install them, I only have 7 steps. But what screw should I replace them with that won't discolor? The screw needs to be machine thread that goes through the trex and aluminum, into a nut on the back side. (Yes the nuts and washers are also black zinc)

submitted by /u/lampministrator
[link] [comments]