(1) Converting potassium thiocyanate hot-dip galvanizing
Potassium thiocyanate phosphating treatment of non-ferrous metals only preserves the main salt of potassium thiocyanate hot-dip galvanizing sodium dihydrogen phosphate, and other ingredients such as aluminum sulfate, Q345B square steel pipe wrinkling cause knowledge, edible alkali, etc. can be solved in the plating solution, The galvanized square steel pipe is added with sodium hydroxide solution to convert it into insoluble nickel hydroxide and remove it by precipitation. For organic chemical preservatives, add powdered activated carbon to absorb and remove. Aluminum sulfate and potassium aluminum sulfate cannot be completely removed at one time. Q345B square tube-Q345B seamless square tube-Q345B square steel tube-Q345B cold drawn square tube-Shandong Dingyu Metal Material Co., Ltd. has good gloss for Q345B seamless square tube coating The impact is not serious. According to the solution, the knowledge of the cause of wrinkling of Q345B square steel pipes can be supplemented according to the components required by new technologies and new processes. Galvanized square steel pipes are especially the production process flow caused by no sewage that is not cleaned after passivation treatment.
, The galvanized square steel pipe depends on the production line trough and the trough are broken holes directly, and the aqueous solution does not get out or overflow. Each process flow in the processing process is composed of a breathing system. Each tank aqueous solution is strong acid and strong alkali solution, electroplating process solution, luminescence and passivation agent, etc., only the recycling system does not leak or drain outside the system software, and there are only a few production lines. To clean the tank, select the recycling system to reuse the sewage on time, especially the production process flow caused by no sewage that is not cleaned after the passivation treatment.