#32 Heat-treating the fittings As I mentioned earlier, I wanted to make the watercooling hardware darker. My prior experiments showed that a fitting turned dark when it was heated and then quenched. Now I wanted to repeat the process for the rest of the fittings. The hardware consists of couple of t-blocks, different swiweling angles and regular fittings. Like the last time, I burned some chopped wood until I got nice hot embers. I mostly used birch to prevent the fire from crackling. Here's a t-block resting in the embers. I used a sausage stick to handle the fittings. Conveniently, when the fittings are hot enough the iron stick starts to gleam red. While heating, one of the fittings got so hot it started to gleam too. The result is a nice blue tone on the bottom fitting. The rest are yellowish-brown black. There is a fine sparkling surface on the fittings. In the picture I used the flash to try and show the tone differece and the sparkle. In real life the effects are not so striking. I could have heated rest of the fittings to match the blueish one, but I'm afraid if I overdo it the nickel plating will start to come off. Interestingly, the Bitspower logos were untouched by the fire. I removed O-rings from all the fittings prior to heating. I wasn't sure if the swiwel angle - pieces had O-rings inside. There's no way to open them. So I had to sacrifice one to find out. Sure enough, an O-ring inside the swiwel boiled out of the seam and then burst into flames. The fire ruined the nickel surface burned and started to peel. The nickel surface is also different than on the straight fittings. It doesn't change colour when heated. The t-blocks have similar surface that refuses to change colour. I didn't heat the rest of the swiwel pieces. This shows the differences to some extent. From the left there is a heated t-block, a heated swiwel angle, a non-treated angle and finally a heated straight fitting. I guess I have to put up with some of the hardware looking chrome. Not that they don't look awesome I'll show you later the rest of what I did last weekend.