Summary Chromium (Cr 0) is a ubiquitous trace metal. The predominant chromium form in the body is trivalent chromium (Cr 3+ ), which may potentiate insulin function when provided at pharmacological doses . …Web

Abstract. A new type of high chromium cast iron (HCCI) was prepared, and its microstructure, mechanical properties, and abrasion resistance were investigated …Web

Progress in chromium research and related diseases. Chromium is a kind of ubiquitous element in nature, mainly distributed in rocks, soil, atmosphere, water and …Web

Trivalent chromium (CrIII) is the principal form of chromium found in diet and supplements. CrIII has been claimed to be involved in the regulation of carbohydrate, lipid, and protein metabolism ...Web

The leaching residue has a high chromium content and can be used as a chromium raw material. Overall, the study overcomes the problem of selective leaching of waste magnesia–chromium refractories, improves the leaching rate of nonferrous metals and precious metals, and realises the comprehensive recovery of solid waste. ... This …Web

In the structure of high chromium white cast irons with chromium about 13% the main carbide is M7C3 [1] [2][3]. Carbides type M3C и M23C6 also persist in the structure of these cast irons.Web

The research has found that the addition of non-carbide forming elements Ni, Cu, Si can increase the potential of the matrix electrode and significantly improve the corrosion resistance of high-chromium cast iron (Ref 6). An appropriate amount of Si will reduce the stability of austenite, transform the matrix into martensite, and improve the ...Web

The article describes the results of experimental studies for the effect of thermal treatment (TTM) of G-X300CrMo27-1 high-chromium cast iron samples in the solid-liquid and liquid state on the ...Web

Fast facts on chromium. Chromium is a mineral that humans need in very small quantities. Good sources include broccoli, liver, and brewers' yeast. Chromium supplements may enhance muscle mass ...Web

Tabrett, C P, Sare, I R, Effect of high temperature and sub-ambient treatmentson the matrix structure and abrasion resistance of a high-chromium white iron, Scripta Materialia, 38 (1998) 1747 – 1753.CrossRef Google ScholarWeb

Ameliorate diabetes patients could potentially use high-chromium yeast as a nutritional supplement. 14 Results from research showed that fasting blood glucose levels decreased considerably in the individuals taking yeast enhanced with chromium; better glycaemic control was indicated with HbA1c values improved; and the total cholesterol …Web

HOU Yuhua, QI Jiyu, YAO Yongmao. The effect of heat treatment on the microstructure and properties of Cr26 high chromium cast iron[J]. Foundry, 2000, 49(s1): 683–685. (in Chinese) Google Scholar TABRETT C P, SARE I R, GHOMASHCHI M R. Microstructure-property relationships in high chromium white iron alloys[J].Web

The research results show that for hypoeutectic high chromium cast iron, when the slurry flow rate increases from 2.5 m/s to 5 m/s, the corrosion wear rate gradually increases. For HHCCI, the wear rate decreases and then increases as the slurry flow rate rises, and the corrosion and wear resistance is better than that of hypoeutectic high ...Web

The water-cooled high chromium cast iron had the highest Rockwell hardness of 66.2 HRC, good wear resistance of 0.6103 g and the greatest friction coefficient of 0.4233, the high chromium cast ...Web

The cooling properties of different cooling mediums were studied and heat treatment of high chromium cast iron was carried out by different cooling mediums. The results showed that the maximum cooling rate, cooling rate at 300 °C and the quenching liquid cooling capacity of water at 20 °C was 193.6 °C/s, 88.6 °C/s and 2431.1, …Web

In a stride towards sustainable solutions, this research endeavors to address the critical issue of water pollution via heavy metals by coupling the power of magnetic nanotechnology, in combination with a green …Web

Introduction. Minerals are essential nutrients for the body and chromium is one of them. Cr with symbol "Cr" with a molecular weight of 51.9961 +/- 0.0006 u occupying allotted space number 24 in Mendeleev table [].Out of all forms of Cr compounds, trivalent Cr is the most stable form in a biological system and found in food, and hexavalent is a …Web

Here are some examples of what this research has shown. High blood sugar levels and diabetes. Chromium supplements are often promoted to improve blood sugar control in people with type 2 diabetes. However, studies examining the effects of chromium on high blood sugar levels or diabetes have had mixed results. The American Diabetes …Web

In short review about the carbides in high chromium cast irons, Wiengmoon [12] emphasized that the kind of secondary carbides depends on the alloy's chemical composition and thermal treatment. He ...Web

In the present study, a high chromium cast iron (HCCI) as the high hard and wear-resistant layer was bonded on the surface of low carbon steel (LCS) at 1633 K. The microstructure and mechanical ...Web

The dashed line in the equilibrium phase figure is the carbon content and chrome content of the studied high chromium white cast iron alloy, according to the chemical composition and the ternary ...Web

In this research work, the wear rate of high chromium balls and austempered ductile iron (ADI) balls as crushing media in a ball mill are compared. ADI are prepared by austenitizing the spheroidal ...Web

Carcinogenic heavy metals are an underappreciated public health concern from wildfire. Fire severity, geology, and ecosystem type influence landscape-scale production of hexavalent chromium ...Web

Earlier understandings of chromium's benefits were based on some preliminary research (much of it not done in humans). ... Long-term use of high doses of chromium may also cause more serious ...Web

The water-cooled high chromium cast iron had the highest Rockwell hardness of 66.2 HRC, good wear resistance of 0.6103 g and the greatest friction coefficient of 0.4233, the high chromium cast ...Web

But heat that is more than 390 degrees Fahrenheit can catalyze chemical reactions that transform it into its more dangerous form, hexavalent chromium, the new study said. Researchers visited the sites …Web

The conducted research shows that the microstructure of the castings consisted of austenite grains and Cr 7 C 3-type chromium carbides. As the amount of titanium increased, the diffraction patterns of the subsequent samples were smoother; therefore, inoculation with titanium reduced the noise (which may mean a more ordered …Web

The present article effectively summarizes the response mechanisms of plants toward chromium ion stress in multiple aspects, by reviewing the relevant …Web

The most commonly used high-chromium white cast iron (HCWCI) is the hypoeutectic white cast iron that contains 2-3.5 wt.% C and 10-30% Cr. This type of material relies on hard, brittle M7C3 ...Web

The research, published Tuesday in the journal Nature Communications, identified high levels of the hazardous metal hexavalent chromium, or chromium-6, at specific types of burn sites along ...Web

A structure is engulfed in flames as a wildfire called the Highland Fire burns in Aguanga, California, on Oct. 30, 2023. After some recent intense wildfires in Northern California, scientists ...Web

Chromium was easily oxidized to high valence (CrO42–) with H2O2 in the second alkaline leaching stage II. Under optimal conditions, 96.24% chromium was leached out. ViewWeb

The article describes the results of experimental studies for the effect of thermal treatment (TTM) of G-X300CrMo27-1 high-chromium cast iron samples in the solid-liquid and liquid state on the ...Web

Yoshinari . Unidirectional solidification of Fe-25% Cr-3.5% C eutectic high chromium white cast irons was conducted under a solidification rate range from 1.3×10-3 mm/s to 1.3×10-1 mm/s ...Web