Ｄ—４型防锈可焊涂料各种钢质容器、管道和构件在坡口后由于种种原因不能立即施焊，这样在存放和运输的过程中，坡口部位往往会产生锈蚀。为此，施焊前需对坡口部位作除锈处理，不仅劳动强度大，增加了现场工作量，提高了成本，而且延长了生产周期，影响施工进度。Ｄ—４... Type D-4 rust-proof weldable coating All kinds of steel containers, pipes and components can not be welded immediately after the groove due to various reasons, so that in the process of storage and transportation, the groove parts often have rust. For this reason, before the welding, the rust removal treatment must be performed on the groove, which not only has a high labor intensity, but also increases the on-site workload and raises the cost. It also prolongs the production cycle and affects the construction schedule. D—4...