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宝钢工程的液压管道与润滑管道总数量将超过100万米,其锈蚀程度有下面三种情况:一是有油漆保护的,这种管道锈蚀情况比较轻微。二是涂有树脂状保护层,但保护不良,有可能是涂层质量欠佳,也有可能在刷涂层前未经严格处理,使锈层继续在涂层下面发展,这种锈层与底金属附着得很牢,难以除去。三是没有保护的裸金属管道,它们在海边工业区露天存放了约二年之久,表面生成一层较厚的连续而疏松的锈层,但管道内壁锈蚀较轻。考虑到工程安装质量要求高,不管内壁还是外壁,所有锈层必须除尽,而且轻锈部位必须最大限度地保护,防止和减少铁损与渗氢。确定的酸洗方案如下。
The total number of hydraulic pipelines and lubrication pipelines of Baosteel Engineering will exceed 1 million meters. The degree of corrosion of the pipelines will be in the following three conditions: First, there is paint protection, and the corrosion of such pipelines is relatively slight. The second is coated with a resinous protective layer, but with poor protection, the quality of the coating may be poor, and there may be no strict treatment before the brush coating, so that the rust layer continues to develop under the coating. The rust layer and the bottom The metal is firmly attached and difficult to remove. The third is unprotected bare metal pipelines, which were stored in the seaside industrial zone for about two years in the open air. The surface generated a thick layer of continuous and loose rust, but the inner wall of the pipeline was lightly rusted. Taking into account the high quality requirements of the installation of the project, regardless of the inner wall or outer wall, all rust layers must be removed, and light rust must be protected to the utmost to prevent and reduce iron loss and hydrogen permeability. The determined pickling scheme is as follows.