Hi, Apologies if this isn’t the right group, but I’m curious about whether black oxide steel is safe around food (produce specifically).
I’m putting together 2 large lazy susans for us to put our produce on. I’m attaching them via black oxide steel rods. Admittedly, it’s overkill but I don’t think wood dowels would provide enough support/sturdiness.
Now I’m wondering if it’s safe to have something like an apple or pear in contact with the steel before consumption. It’s certainly not the intended use, but is it unsafe?
TIA
Here are the parts, if it matters:
https://www.grainger.com/product/TE-CO-Steel-Flat-Washer-2YJE8
https://www.grainger.com/product/TE-CO-5-8-11-Hex-Nut-Heavy-2YHJ4
https://www.amazon.com/dp/B07N92961X/ref=cm_sw_r_cp_api_glt_fabc_DECX980D2F9QP47N4RY3?_encoding=UTF8&psc=1
I'm deciding on a finish for some 1008 bent sheet metal for exposed surfaces on a product that will be used in homes like a sewing machine, and I really like the look of black oxide.
Practical Machinist and everywhere else I've looked says "black oxide doesn't prevent rusting".
I'm testing out EPI's Insta-Blak 333 kit with a E-Tec 503 sealer. It says it has a 35-day humidity rating per ASTM-D-1748, which seems to be 35 days in a 50 degC chamber suspended over clean water at whatever % relative humidity that works out to. That's pretty aggressive compared to a home countertop, but the product will be used for years-- not just 35 days.
My question is: is black oxide okay to use on home tools, with the expectation of occasional resealing/ light oiling, or should I powder coat? Do you think customers who aren't machinists would be put off by taking care of a black oxide coating at however often it needs love in a home environment?
For instance if I have an older blade already made, would I be able to bring it to most bladesmiths and have them put a black oxide coating on it and or that more of a specialized process?
https://www.pluginboutique.com/deals/show?sale_id=9049#a_aid=605d605c4aba7 Affiliate link. We receive a commission which helps support the subreddit.
Okay, so I don’t know if anyone will have an answer, but here would be the right place to ask. I am looking at making oil skin cloth to be used for tarps, bags, etc.. for winter camping (Michigan). Most of the sources I have found suggest using red iron oxide, boiled linseed oil, & mineral spirits. However, I discovered that black iron oxide exists and I would prefer a black/charcoal color to the reddish brown you see for oil skin cloth. So is there any difference between red and black iron oxide? Will it do the same thing but just come out a different color? Sounds obvious, but all the sources I found say to use red iron oxide (Does not mention black) and when I went to research the difference I discovered that they do differ in some way, but I got lost in a bunch of chemistry jargon.
I’d greatly appreciate any insight!
I am planning on using this on drop cloth, but if you have any experience with this let me if you have any other suggestions or tips.
Additionally, if you don’t know what I am talking about I suggest looking into it. The possibilities are endless and I am very excited to custom make new equipment.
Hi.
I need some advice.
I'm installing a 500ltr PVC reservoir water tank in my house, which we're putting it in the attic. I got a welder to make a 2 feet high steel base, on which the tank will be kept.
The water tank and the steel base will be out of sight out of mind kind of situation, so i don't need to worry about giving it some fancy colour. But i still need to paint the steel base to protect it from rust and corrosion.
Now Red oxide steel primer and black japan paint are both anti corrosive. Which one should i use... That's my question.
Any help would be highly appreciated.
Thank you.
Hello r/metallurgy!
I have a A2 tool steel part that has black oxide treatment with a hardness requirement of 55-58HRC. We received a first article piece and our quality department is failing the part due to low hardness (54HRC). But after I sanded off the black oxide and retested I get results in the 55-56 HRC range. I just want to confirm that prior to any hardness testing we must remove any oxide layers (rust, black oxide) etc. as this can alter results. Thanks!
