Hydrojet pretreatment method for accelerating stabilization of rust layer on surface of weathering resistant steel
A technology of surface pretreatment and surface treatment agent, which is applied in the field of steel anticorrosion and can solve problems such as high cost and complicated process
Inactive Publication Date: 2015-02-11
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0004] Although foreign rust stabilization methods can reduce the pollution of rust liquid, accelerate the stabilization of the rust layer, and improve the appearance of the steel structure, the cost of these methods is high, the process is complicated, and the time for the stabilization of the rust layer also takes about one year.
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Embodiment 1
[0018] In this embodiment, the verification based on the weathering steel surface pretreatment technology in the spray accelerated experiment includes the following steps:
[0019] Step 1. Cut the weathering steel into 50mm×50mm, after degreasing with acetone, clean it with absolute ethanol and dry it;
[0020] Step 2. Prepare 100g weathering steel surface treatment solution (0.6%NaCl+0.9%FeSO 4 +0.6%CuSO 4 +0.9%NaHSO 3 ). Use the prepared weathering steel pretreatment solution to spray the weathering steel sample. After the surface of the sample is dry, repeat the spraying treatment solution twice, and then spray the treated sample with clean water to remove floating rust, and use a scanning electron microscope Observe the morphology of the cross-section of the rust layer, and analyze the element distribution in the rust layer with energy spectrum;
[0021] Step 3. Spray 0.5% NaCl on the weathering steel after surface pretreatment and bare steel without surface treatment ...
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Abstract
The invention relates to a hydrojet pretreatment method for accelerating the stabilization of a rust layer on the surface of weathering resistant steel, belonging to the technical field of steel material corrosion prevention. 0.1-3 percent by weight of NaCl, 0.3-3 percent by weight of FeSO4, 0.1-3 percent by weight of CuSO4 and 0.3-3 percent by weight of NaHSO3 are mixed with water uniformly to obtain a surface treating agent of the weathering resistant steel, wherein the surface treating agent is sprayed on the surface of the weathering resistance steel. Chemical materials in a solution react with a steel base to generate a uniform and compact protective rust layer, so that the weathering resistant steel is more attractive in a use process, and rust liquid loss is prevented and the environment can be protected from being polluted. The hydrojet pretreatment method is convenient to operate and short in period, and can be widely applied to weathering resistant steel engineering structures of bridges, buildings and traffics.
Description
technical field [0001] The invention belongs to the technical field of steel material anticorrosion, relates to the corrosion of steel materials in the atmospheric environment, and in particular relates to the weather-resistant steel surface pretreatment technology. Background technique [0002] Although weathering steel greatly reduces the atmospheric corrosion rate with the help of its surface protective rust layer, in the natural state, the formation of its protective rust layer often takes several years. Before the protective rust layer is formed, the appearance of the steel structure is poor, and it will produce rust liquid to pollute the environment. [0003] Japanese scholars have been developing and researching weathering steel rust layer stabilization treatment technology since late 1955. This technology is to apply a treatment to the surface of the weathering steel before using it to shorten the time for the weathering steel to stabilize the rust layer. Formation ...
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IPC IPC(8): C23C22/76
Inventor 张旭杨善武贺信莱王吉英马森吴宏业尚成嘉王学敏郭晖
Owner UNIV OF SCI & TECH BEIJING