2003年1月26日 · Without manganese in the iron, undesired iron sulfide (FeS) will form at grain boundaries. If the sulfur content is balanced by manganese, manganese sulfide (MnS) will form, ***which is harmless*** because it is distributed within the grains. The optimum ratio between manganese and sulfur for an FeS-free structure and maximum amount of ferrite is:

2013年10月18日 · Aeration to remove hydrogen sulfide does not typically produce satisfactory results. CO2 is also released concurrently with the hydrogen sulfide, raising the pH and causing the hydrogen sulfide to stay in the water. H2S(g) <====> H2S(aq) When dissolved in water, hydrogen sulfide is partially ionized, so that it exists as a mixture of H2S and HS -.

2010年5月18日 · I would recommend a continuous potassium permanganate oxidation with manganese greensand filtration to remove hydrogen sulfide. A potassium permanganate solution can be injected into the water with a small chemical feed pump installed ahead of a holding tank that provides at least 15 minutes of contact time.

2015年7月16日 · And the "woody" fracture surface appearance is typical of steels with elongated manganese sulfide inclusions, which grade 1144 has in abundance. RE: SAE 1144 shaft fracture surface morphology EdStainless (Materials) 16 Jul 15 16:34

2009年8月5日 · The sulfide ion then combines with the hydrogen ion to form sulfuric acid. The sulfuric acid then will dissolve and erode away the concrete structure from the inside of the manhole. Corrosion experts have moved away from specifying interior bitumastic linings because of the historically poor performance.

2005年7月26日 · I've applied the pomeroy and parkhurst equation to calculate the amount of sulfides generated at forcemain discharge structure. I've been asked to calculate the concentration of hydrogen sulfide in the gas phase. Is there a way to convert the 2 mg/l of dissolved sulfides to a ppm of hydrogen...

2003年12月25日 · The same holds true for WCB and WCC. The max Manganese content of the "C" is higher than the "B" but in the notes the "B" allows more Manganese the lower the Carbon is relative to the maximum allowance to such an extent that if you have WCB/LCB with Carbon 0.25% (i.e. as per WCC/LCC limits) the max allowable Manganese is as per WCC/LCC!

2000年12月21日 · 3004 is the alloy commonly used for beverage cans, but 5182 alloy is used for the ends. 3004 has nominal 1.2% manganese and 1% magnesium, with the balance being aluminum.5182 has nominal 5% magnesium, .7% manganese and .1% chrome.These alloys are work hardenable, not heat treatable. I would try a metal service center as a source.

2013年7月18日 · The risk at near ambient temperatures is that of cracking due to H2S. Sulfide stress cracking (SSC) and hydrogen induced cracking (HIC) can occur depending on chemistry and strength/hardness. I recommend taking a look at NACE MR0175 if …

2007年3月5日 · Hi all, Recently i came across a thing, where we selected RPTFE as the seat material for trunnion mounted ball valve with an operating conditions of max. temp 53 deg C and pressure upto 16.9 barg. However, the VENDOR has provided / suggested DEVLON seat material against the one we have...