959results about How to "Reduced corrosion resistance" patented technology

The invention discloses a method for treating wood at high temperature and with hot water, comprising following steps: (1) putting wood in high temperature furnace; increasing temperature at furnace to 120-150 Deg. C and keeping temperature; (2) increasing temperature to 180-240 Deg .C when the water content of wood reduced to lower than 5%; keeping temperature and the time is 0.5-3 hours according to wood thickness per cm; (3) reducing temperature at furnace, treating wood with steam or hot water when temperature is reduced below 100 Deg. C to reduce wood water content to 7-10%; (4) reducing temperature continuously and getting wood out of furnace when the temperature inside wood is reduced to about 40 Deg. C; (5) balancing at atmosphere for more than 15 days. The invention can increase size stability, rotproofness and weather ability of wood, and the wood can be applied in environment with large change in humidity and temperature.

The invention discloses molybdenum-containing nickel-saving austenitic stainless steel with excellent corrosion resistance and a manufacturing method thereof. The molybdenum-containing nickel-saving austenitic stainless steel with excellent corrosion resistance contains: by weight, 0.03 to 0.10% of C, 0.2 to 1.0% of Si, 4.0 to 9.0% of Mn, 16.5 to 18.0% of Cr, 1.5 to 3.5% of Ni, 0.15 to 0.35% of N, 0.2 to 0.8% of Mo, 0.01 to 2.5% of Cu, less than or equal to 0.1% of one or more of V, Nb, Ca and B, and the balance Fe and unavoidable impurities. Through the manufacturing method, Ni content is controlled in a rang of 1.5 to 3.5%, and Mn and N elements are added to replace precious metal Ni to be utilized for austenitizing, so that a microstructure of room-temperature austenite is obtained. The manufacturing method adopts 0.2 to 0.8% of Mo and utilizes a synergistic effect of Cr, Mo and N to improve corrosion resistance. Through the manufacturing method, the pitting-resistance equivalent number of the molybdenum-containing nickel-saving austenitic stainless steel with excellent corrosion resistance is great than or equal to 18 and the pitting potential is great than or equal to 330mV, wherein the properties of the molybdenum-containing nickel-saving austenitic stainless steel with excellent corrosion resistance are equivalent to or superior to corresponding properties of 304 austenitic stainless steel.