老虎机大全

    <li id='gh362'></li>

    <dd id='gh362'><tbody id='gh362'><td id='gh362'><optgroup id='gh362'><strong id='gh362'></strong></optgroup><address id='gh362'><ul id='gh362'></ul></address><big id='gh362'></big></td><table id='gh362'></table></tbody><pre id='gh362'></pre></dd><span id='gh362'><b id='gh362'></b></span>

            <dfn id='gh362'><optgroup id='gh362'></optgroup></dfn><tfoot id='gh362'><bdo id='gh362'><div id='gh362'></div><i id='gh362'><dt id='gh362'></dt></i></bdo></tfoot>

            <ul id='gh362'></ul>

              • <small id='u2cc5'></small><noframes id='u2cc5'>

                  <tbody id='u2cc5'></tbody>

              • <tfoot id='u2cc5'></tfoot>

                    <legend id='u2cc5'><style id='u2cc5'><dir id='u2cc5'><q id='u2cc5'></q></dir></style></legend>
                    <i id='u2cc5'><tr id='u2cc5'><dt id='u2cc5'><q id='u2cc5'><span id='u2cc5'><b id='u2cc5'><form id='u2cc5'><ins id='u2cc5'></ins><ul id='u2cc5'></ul><sub id='u2cc5'></sub></form><legend id='u2cc5'></legend><bdo id='u2cc5'><pre id='u2cc5'><center id='u2cc5'></center></pre></bdo></b><th id='u2cc5'></th></span></q></dt></tr></i><div id='u2cc5'><tfoot id='u2cc5'></tfoot><dl id='u2cc5'><fieldset id='u2cc5'></fieldset></dl></div>

                        <bdo id='u2cc5'></bdo><ul id='u2cc5'></ul>

                          • Why sand cast aluminum turn black or white spots

                            2019-03-23 18:09:15

                            Aluminum alloys are widely used in the foundry industry. Aluminum alloys have good fluidity and plasticity, but they tend to become black or white spots during use. What is going on?

                             

                            1. The process design is unreasonable

                            Improper handling of aluminum sand castings after cleaning creates conditions for moldy blackening and whitening of sand casting aluminum, which accelerates the generation of mold

                             

                            2. Warehouse management is not in right place

                            When sand cast aluminum is stored at different heights in the warehouse, its moldy condition is also different.

                             

                            3. Internal factors of aluminum alloy

                            Many sand casting aluminum manufacturers do not do any cleaning after casting and machining processes, or simply rinse with water. Substances and other stains, these stains accelerate the blackening of sand mold aluminum mold spots.

                             

                            4. External environmental factors of aluminum alloy

                            Aluminum is a lively metal. It is very easy to oxidize and turn black or mold under certain temperature and humidity conditions. This is determined by the characteristics of aluminum itself.

                             

                            5. The cleaning agent should not be used properly

                            The selected cleaning agent is highly corrosive, causing corrosion and oxidation of sand cast aluminum.


                            ZheJiang Dongrun Casting Industry Co,.Ltd was built in 1995, We have been in the casting industry for more than 25 years. No matter what type of molding you need done, we are the right supplier for your jobs. Unlike other of our competition, we offer four types of castings.
                            company-2.jpg

                                    ❖Sand casting

                                    ❖Gravity Die Casting

                                    ❖High pressure Die casting

                                    ❖Low pressure casting


                            Dongrun Casting have 20000 square meters facility houses and 200 production & test equipment, From quotation and tooling design to casting and finished machining, we  can work with you at every stage. We serves wide range of industries-from Fortune 500 corporations to small and midsize OEMs. Our products includes:

                                  ❖   Automotive&Trucking

                                  ❖   Utilities Industry

                                  ❖   Metering System

                                  ❖   HVAC

                                    ❖   Medical Device

                                    ❖   Electrical Lighting

                                    ❖   Architectural parts

                                    ❖   Furniture parts

                            Browse our online showroom to see what we can do for you. And then E-mail: us your specifications or inquiries today




                            乐酷棋牌---老虎机大全_欢迎您 升机棋牌---老虎机大全_Welcome 最好赌博网 - Why sand cast aluminum turn black or white spots - Dongrun Casting 下载游戏斗牛---HOME_Welcome 提棋牌可以的 - Why sand cast aluminum turn black or white spots - Dongrun Casting